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TI LIU C BN Thit Tutorial

Trc khi bt u

Vic ci t c bn cc ti liu hng dn, gii thch hu nh tt c cc tiliu ca cc tham s vt liu Vray. Nu bn cha quen vi Vray, xin vuilng c nhng hng dn c bn v li cc ci t ln u tin, do , bnc th bt u trong hng dn ny ng cch.

Ngoi ra chc chn rng bn c k nng c bn 3DS Max, t Vray l mt3D Studio Max cm, n da vo ti a ca cc chc nng rt nhiu qu.

Vray cc phin bn ti s dng cho cc hng dn ny l 1.47.03.

1. t v li cc ci t

gii quyt vic v li cc ci t hp thoi v thc hin nh sau:- Thit lp Vray l renderer- Sn lng kch thc 480 * 360px

- Ton cu tc: tt n mc nh- Hnh nh sampler adaptive QMC- Antialising b lc "Mitchell-netravali"- V vic gin tip bi ln- Trung bounces h n 0,85- Irradiance bn ci t:

- "Thp" ci sn- Hsph subdivs = 30

- Mi trng:- Skylight hon ton trng mu- Phn nh / refraction hon ton trng, h s 1,2

- H thng: v li khu vc phn chia 50 * 50 px

2. To mt testscene

Hy gi n n gin. p teapot l rt tt cho cc i tng gy th nghim,


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bi v hnh dng ca n. l l do ti sao n l mt trong nhng i tngu tin 3d khng!

Lm cho hai teapots trn mt my bay ln hn nu bn mun lm theohng dn ny cng gn cng tt.

3. gii quyt nhng ti liu bin tp

M trnh son tho ti liu bng cch nhn "m" trn bn phm
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4. Ti mt Vraymaterial

Bo ch l "tiu chun" nt trong ti liu chnh sa v chn VRayMtl tdanh sch. Nhp p chut vo hoc ko v th n vo mt trong nhng tiliu slots

5. i tn v mu sc

i tn cc ti liu "teapot1". Cc tham s u tin trong cc ti liu l

diffuse khe. y l chnh mu sc ca vt liu. Nhng hnh vung bn cnh l mt bn slot, bn c th ti bitmaps hoc cc loi bn y tin nhng ti liu. by gi, ch cn lm cho mu sc swatch mt nh

sng mu da cam

6. Th hai nguyn vt liu

Lp li cc bc trc to mt ti liu rt nh xm. i tn cc ti liuny "groundplane" v gn n vo groundplane v nh teapot. Bn phi cging nh trong hnh nh bn phi.
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7. u tin v li

S lt truy v li! Hnh nh ca bn s trng ging nh ti, nu bn c cit v li tt c cc ti sn nh trong bc 1. Hy chc chn rng mc nhl tt n!!!

8. Phn nh

Chn mu cam nguyn vt liu trong cc ti liu bin tp. Di y lnhng diffuse khe phn nh cc ty chn ca vt liu. Mu sc swatch bncnh 'phn nh' phn nh chnh l kim sot. Mu en c ngha l khng c tt c cc phn nh, mu trng c ngha l nguyn vt liu s tr thnh100% phn. Nu bn lm cho n tr thnh mu v d, s c phn nhtinted mu .

Trc tin hy th mt mu xm, phng tin truyn thng.


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9. V li

S lt truy v li. Thng bo vic tr nn rt phn teapot.

Hy th mt mu xm ti tm, v nh sng rt xm qu xem s khc bit

10. Ti a chiu su

t mu sc phn nh hon ton trng, v t ti a chiu su ca thams 1 v bm phm v li.

Bn s nhn thy rng nhiu vng chuyn mu en. Vic kim sot suti a bao nhiu ln mt tia c th phn nh tnh ton trc khi dng. Chiusu ti a l 1 c ngha l ch c 1 phn x c th din ra. 2 c ngha l mts phn nh ca mt phn x c th tn ti v nh vy v ...


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11. Hy thot khi mu sc

li su ti a 1 v thay i mu sc i theo li ra vo mu . Chnh ti liu ny cng cho nh teapot.

V li mt ln na.

By gi tt c cc phn nh v thc hnh ln lt thay v mu en.

Nhng chiu su ti a l mt cch gim rendertimes trong cnh vi rtnhiu phn i tng. Tuy nhin, do h thp nhng phn nh, theo li ramu sc s c kh nng i vo chi. i khi n l do c th thay i nyhu ch khc hn mu en, ci g thch hp hn cho cc cnh cho v d.


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12. Ti a chiu su

Thit lp li theo li ra vo mu en v vui chi vi cc tham s ti a chiu

su cho n khi hu ht cc khu vc mu en bin mt.

Thng thng bn khng nn i cao hn nhiu so vi 10. Cao hn con sny ch c gi tr eo tr rendertime cho hnh nh khng c ci thin.

13. Fresnel phn nh

Fresnel l mt s phn nh hin tng xy ra trn hu ht tt c cc bmt phn. Phn ca b mt trc tip ti im , bn s phn nh t hn phnca b mt i mt i vi bn theo mt gc ln hn.

S lng c kim sot hiu qu ca cc IOR ca vt liu. Bn c th tmthy iu ny trong cc tham s refraction. Trong thc t cuc sng, ccfresnell hiu qu l lun lun c lin kt ny IOR. Trong Vray Tuy nhin,

bn c th ngng lin kt chng, ci t khc nhau IOR cho l phn nh chorefraction. lm c iu ny, hy nhp vo L nh bn cnh fresnell trng. Cc hp fresnell IOR s tr thnh c sn.


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14. Fresnel phn nh

Leave the fresnell IOR ti 1,6 v nhn v li. Thng bo gia tepot phnnh yu hn cc bn. y l hiu ng fresnel.

H thp fresnel IOR tng cng hiu lc. Bn cng thp i, th t hn, ns phn nh gia. Nu bn i tht s cao, n s c ging nh cc binfresnel off (> 25).

15. Teapot 2 ti liu

Bn sao cc ti liu mu cam, i tn n teapot 2 v gn n vo teapot nh.Thay i mu diffuse vo mt mu ti tm.


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16. Phn nh glossiness

Chn vt liu mu cam. Thay i mu sc tr li phn nh mt phng tintruyn thng xm. Tt fresnell thc hnh.

Thay i glossiness phn x t 1,0 n 0,8.

17. Phn nh glossiness

S lt truy v li.

Nhng phn nh rt blurry ngay by gi. y l hiu ng bn nhn c t

cc i tng trn thc t rt nh bumps trong cc b mt. to hiu ngny trong 3D, bn cng c th t mt bumpmap rt tt p trong bumpmapkhe. Tuy nhin, bng cch s dng tham s thay v glossiness, v s nhanhhn rt nhiu.

Nghe glossiness vi cc gi tr xem nhng g n hin.

Glossiness c ngha l 'shinyness', do , glossiness = 1,0 shiny l 100%,thp hn gi tr c khng glossy blurry hoc thc hnh. C rt nhiu rcri v vic ny, nhiu ngi s k kt hp vi cc thut ng glossy blurry.
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18. Smoother blurry phn nh

Cc subdivs gi tr di refl glossiness khin Smoothness ca blurry thc

hnh. Thay i n vo 20 v v li. Kt qu l nhiu smoother.

Lu rng 8 subdivs c ngha l 8 * 8 = 64 mu, 20 subdivs c ngha l 20 *20 = 400 mu. Gp i cc subdivs s c + -4 ln cn v li!

Hy chc chn rng bn c sampler ti AA adaptive QMC khi s dng ccgi tr cao subdivs!! Nu bn mun s dng adaptive subdivision AA, bnc th i vi nhiu subdivs gi tr thp hn (3 n 10). Cc adaptive AAsmooths ra rt nhiu nhng ting n t thp subdivs. Nu bn c rt nhiu phn nh

blurry trong cnh, adaptive QMC s lun lun c nhanh hn.

19. QMC ci t: mn blurry cc phn nh nhiu hn

Nu bn mun c ting n, ngay c smoother, tng subdivs s khng lunlun gip . Khng c i cao hn nhiu so vi 40 c gng lm gim
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ting n. Mt gii php tt hn c th c tm thy trong QMC sampler cit.

gii quyt vic v li cc ci t hp thoi v i n QMC samplerrollout. Thay i ting n n ngng 0,001 v v li mt ln na. Nhngting n s c hon ton i ngay by gi, nhng cc chi ph cnrendertimes.

Cc QMC sampler ci t cho bn mt cch d dng tng tc thnghim a, ch n gin bng cch tng ngng ting n cho v d nh0,05. Lu rng cc thit lp QMC sampler cng s nh hng nirradiance bn v tnh ton DOF, MB, Din tch Shadows, vv .. V vy,gim thiu ting n nm s khng ch ci thin hiu qu ca glossy, m cnl cht lng Gi vv ..

By gi, thay i ting n quay li ngng 0,005. Trong khi chng ti ang y, hy vo h thng v rollout cho php Vray du (xo tt c cc vn

bn, tr cc phn rendertime). Bn s thy tc tt hn nhng s khc bitnh vy.

20nh du glossiness

Bn c th bit 'ni bt' t mc nh ti a nguyn vt liu. Vng, nhngim ni bt l khng c g nhiu hn blurry gi phn nh. p ni bt thtl mt s phn nh ca mt sng lightsource.

Trong cc phin bn trc ca Vray, khng c cch no v li nhng gini bt vi Vraymaterials. Hin ph binLu rng nhng im ni bt s

ch xut hin nu bn s dng n chiu sng trong cnh ca bn. Ccskylight s khng to ni bt.


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nhu cu, mang li s pht trin gi mo ni bt cho Vraymaterial.

xem hiu qu ca glossiness ni bt, to ra mt ti a spotlight hngdn ti hai teapots.

R xung skylight h s 0,0 cho n kim tra ny. Chng ti khng munbt c nh sng n t bu tri.

In the spotlight ci t, bt Shadows v chn Vray Shadows trong bng ti

loi danh sch.22. V li

V li cc cnh.

Nhng trng trn teapot l ni bt glossiness, cc blurry gi phn nh. Mtti a l v spotlight vo camera v phn nh, nhng vi tham s ny ni

bt glossiness bn c th lm cho n c nhn thy trong thc hnh.


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23. nh du glossiness lin kt

Theo mc nh, ni bt l glossiness ci t linkes vo refl glossiness thams. ny c ngha l khi bn s dng refl glossiness v bn c n chiu sng

trong cc cnh, cc glossiness ni bt s xut hin qu.

24. Ngng lin kt n!

L bm nt bn cnh cc tham s ni bt glossiness. Cc gi tr ni btglossiness s c nhn thy v c ci l 1,0

S lt truy v li .... ni bt l vic i!

Mt gi tr ca 1,0 c ngha l khng c ni bt glossiness (nh 1,0 cho


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blurry phn nh khng c ngha l blurry phn nh).

25. nh du glossiness ch?

Nu bn mun ch c ni bt glossiness xut hin, v khng phn nh

glossiness, bn s phi s dng mt t trick.

Logic bn s ngh rng 1,0 cho refl bng h s ln lt i. iu ny l ng,nhng thc s vn xut hin, ch sc nt. Pha trn vi cc phn nh sc ntni bt glossiness to ra wierd unrealistic nguyn vt liu. Ch cn th n.t nh bng n 0,75 v refl bng 1,0 v nhn v li.

Mc d bn c th ging nh ti liu ny, n khng phi l thc t. lphn nh cc ngun nh sng trong mt blurry cch, v phn cn li ca mitrng trong mt cch sc nt! l quan trong thc t i sng, nh c

phn nh khng lm nn s khc bit no gia cc n chiu sng hoc cc

26. Tt phn nh

V vy, c th v li ni bt ch c bng, bn cn phi tt chc nng thchnh cho cc vt liu. iu ny l c th c trong Vray, nhng c ci tn trong cc ty chn rollout ca Vraymaterial.


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B chn 'trace phn nh' v v li mt ln na.

Lu rng hin nay nhng ti liu ch c nhng gi glossy thc hnh. Tiliu ny nh mt tiu chun ti a cc ti liu vi mt s hightlights trn n.

y l mt unrealistic vt cht, bi v n phn nh sng ngun, nhng khngphi phn cn li ca mi trng

27. Bn slots

Tip theo phn nh tt c cc tham s l mt bn khe. iu ny cngha l bn c th kim sot phn nh mu sc, refl glossiness, ni btglossiness v fresnel gi tr ca mt bn .

V d phn nh khe. Click vo n v chn "checker" t danh sch. Lm chon c nhn thy trong viewport bn c th xem bn nu n itng mt cch chnh xc.

Tt c cc thit lp khc phn nh v cc ci t mc nh (mu xm,phng tin truyn thng, khng c fresnel, tt c cc glossy = 1,0, theo diphn nh vo). Xa v thit lp cc spotlight skylight tr li 1,0.


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S lt truy v li.

Bn s nhn c ging nh trong v d. Tt c cc phn mu en ca bn s khng phn, tt c cc phn mu trng l 100% phn.

Hy th cng mt bn trong qu slots khc. Tuy nhin, chm sc, mutrng cho glossiness c ngha l mt gi tr 1,0, do , khng blurry, v muen c ngha l rt blurry (tr gi 0,0 cho glossy).

28. S dng interpolation

Hin l mt trong nhng trng cn li trong cc thng s phn nh rng ti khng gii thch. The 's dng interpolation' trng. iu ny c thc s dng tng tc tnh ton ca glossy thc hnh. N lm vicnhiu hn hoc t hn theo cng mt cch nh l Irradiance bn tnh

ton g.

Khi bn kim tra hp ny, bn c th iu chnh interploation ci t trongmt trong nhng khc Vraymaterial rollouts.

Ti s khng gii thch v cc ci t ny, bi v ti khng khuyn bn nns dng cho interpolation glossy thc hnh. H him khi nhn tt, v khi bn


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mun c cht lng cao, h mt gn nh l tiu chun glossy thc hnh.

Nu bn mun bit thm chi tit v interpolation, xin vui lng tham kho stay.

BAI SO 2

Trc khi bt u

Nu bn pht hin ny Vrayhng dn, trang thng quamt lin kt trc tip hoccc cng c tm kim, xinvui lng lu rng bnang trn trang 2 ca

hng dn! Xin vui lnghon tt trang 1 u tin,nu bn khng lm nhvy.

Th hai ny l tt c cctrang v refraction!

1. Bt u mt cnh mi

gii quyt 3d studio tia v bt u mt cnh mi.

gii quyt vic v li ccci t hp thoi v thc


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hin nh sau:- Thit lp Vray l renderer- Sn lng kch thc480 * 360px

- Ton cu tc: tt n mcnh- Hnh nh sampler adaptive QMC- Antialising b lc"Mitchell-netravali"- V vic gin tip bi ln- Trung bounces h n 0,85

- Irradiance bn ci t:- "Thp" ci sn- Hsph subdivs = 20

- Mi trng:- Skylight hon ton

trng mu- Phn nh / refraction

rnh mch en, h s 1,0- H thng:

- V li khu vc phn

chia 50 * 50 px- Khung du: xa tt c

ngoi tr cc phnrendertime

Trc khi bt u

Nu bn pht hin ny Vray hng dn, trang thng qua mt lin kt trc tip hoc cc c tm kim, xin vui lng lu rng bn ang trn trang 2 ca hng dn! Xin vui ln

hon tt trang 1 u tin, nu bn khng lm nh vy.

Th hai ny l tt c cc trang v refraction!

1. Bt u mt cnh mi


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gii quyt 3d studio ti a v bt u mt cnh mi. gii quyt vic v li cc ci t hp thoi v thc hin nh sau:- Thit lp Vray l renderer- Sn lng kch thc 480 * 360px- Ton cu tc: tt n mc nh- Hnh nh sampler adaptive QMC- Antialising b lc "Mitchell-netravali"- V vic gin tip bi ln- Trung bounces h n 0,85- Irradiance bn ci t:


- Mi trng:- Skylight hon ton trng mu

- Phn nh / refraction rnh mch en, h s 1,0- H thng:

- V li khu vc phn chia 50 * 50 px- Khung du: xa tt c ngoi tr cc phn rendertime

Trc khi bt u

Nu bn pht hin ny Vrayhng dn, trang thng qua

mt lin kt trc tip hoccc cng c tm kim, xinvui lng lu rng bnang trn trang 2 cahng dn! Xin vui lnghon tt trang 1 u tin,nu bn khng lm nhvy.

Th hai ny l tt c cctrang v refraction!

1. Bt u mt cnh mi

gii quyt 3d studio ti


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a v bt u mt cnh mi.

gii quyt vic v li ccci t hp thoi v thc

hin nh sau:- Thit lp Vray l renderer- Sn lng kch thc480 * 360px- Ton cu tc: tt n mcnh- Hnh nh sampler adaptive QMC- Antialising b lc"Mitchell-netravali"- V vic gin tip bi ln- Trung bounces h n 0,85

- Irradiance bn ci t:- "Thp" ci sn- Hsph subdivs = 20

- Mi trng:- Skylight hon ton

trng mu

- Phn nh / refractionrnh mch en, h s 1,0- H thng:

- V li khu vc phnchia 50 * 50 px

- Khung du: xa tt cngoi tr cc phnrendertime


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2.

To ra testscene

Ti ngh s dng cng

mt loi i tng nh ti lm. p teapot ti ahin nay l khng tt v lic l trong , khng phi'watertight' v bn khngmun rng vo refractivei tng. Ti sa iny torus knot v n s lmt th v vi hnh dng

kim tra, bi v tt c cccurves v mng / dy khuvc.

Nu bn mun, hy s dngchnh xc ging nh ti ci t (bm vo hnh nh

bn phi xem tt c ccci t).

3. To ti liu

Thc hin mt phng tinti mu xanh Vraymaterialcho groundplane, v mtnh sng xm Vraymaterialcho torus knot v gn nvo cc i tng tngng.

S lt truy v li, bn snhn c ging nh ti vd bn phi


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4. Refraction tham s

V nguyn vt liu trngv hy xem cc thng srefraction. Refraction l qunh tia bent nhn c khii t mt trong nhng

phng tin truyn thngkhc. V d nh nh sngTravels thng qua khngkh, sau truy cp mt i

tng thu tinh v cc tiac bent di mt gc .Sau , tia ny s i du lchxa hn thng qua cc thytinh, v cui cng s rikhi n mt im, nhnc bent li.

Bao nhiu mt tia bent sph thuc vo IOR (index

of refraction) ca ti liuny. p IOR cao c nghal nhiu un, IOR = 1,0ngha l cc tia s khngBend.

Cc vt liu Vray c ttc cc ty chn sn sng to ra bt k loi vt liu

refractive. Nh bn c thnhn thy, rt nhiu tychn l tng t vi nhngthng s phn nh.

Trc ht, thay i mu screfract trung vo mt mu


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xm.

5. Bn dch: Ting Anh

Ting Vit12.

Store w ith irradiance map option

The disadvantage of this option

GI light, but worse, also more se

4. Refraction tham sRefraction mu

V li hnh nh. Bn s thyi tng c mt minh bchhn. Cc mu xm c nghal n refraction ca khong50% minh bch.

6. Diffuse mu

Diffuse thay i mu env v li mt ln na. Ktqu l kh n gin.


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7. Refraction mu

Refraction thay i mu sc hon ton trng v v li.

Kt qu s l ...

Bi v hin nay i tng l100% minh bch, ccdiffuse mu khng c hiulc tt c cc na. Nhngvng en l tia c refractedi vi mi trng mu sc,c mu en.

8. iu chnh phn nh

Cc bc trc v l, bi vthng l nguyn vt liuvi nhng refractive ti sncng c cc phn. Nu

bn t phn nh honton trng, v kim tra phn

nh fresnel, cc nguyn vtliu s tt hn rt nhiu.

Nhng ti liu m bn to rahin nay l c bn cho ccthit lp r rng knh trongVray.


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9. To ra mt mi trng

Cc v trng rt boring, viu duy nht refract /

phn nh l groundplane vmi trng mu en.

To mt ln, hp mng vv tr ca n nhiu hn hoct hn nh ti lm.

10. VrayLightMtl

Mc ch l chuyn hpny vo mt ngun nhsng. Mt cch d dng lm c iu ny, l bngcch s dng c bitVrayLightMaterial. Bmvo nt nhn c ti liuv chn VrayLightMtl tdanh sch. Ch nh nhng

ti liu vo hp v t cch s n 8.0

11. iu chnh skylight

S lt truy v li. lcch qu ti sng, bi v

chng ti skylight vn cnhot ng. t skylight voh s 0,0 v v li mt lnna. Nu n qu sng hayqu ti, bn cn chi vicc Vraylightmaterial nhn
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cho n khi n trng ok.

Bn c th nhn thy r rngl tha nh sng n t hp

ln ca chng ti ngay bygi, v cc ngun nh sngcng phn nh trong cctorus knot. Nhng phngia nh sng rt ti sngv mu en l mi trngrt tt cho v knh hoc kimloi nh cc i tng.

12. Refractive Gi caustics

nh sng n t hp khngphi l trc tip vi nhsng nh mt ti aspotlight. l thc s ix nh l ln u tin tungln Gi (ging nh cc Vrayskylight). Nu qu v c th

tt Gi v v li, s khng cnh sng tt c mi ngi.

Bi v iu ny, iu quantrng l bn ri khirefractive Gi caustics tronggin tip bi ln rolloutngy. Hy th v cnh ny

m khng c refractive Gicaustics.

Bn s thy Shadows, nhiudarker. Cc Gi nh sng bygi khng th vt quatrough minh bch cc i


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tng (khng c Gicaustics). Caustics c ch nhiu hn refracted / phnnh sng.

tip tc, ln ltrefractive Gi caustics Ngyli. Ngoi ra i nirradiance bn rollout vci sn ty chnh. Thayi pht / ti a t l -4/-2 tng tc v. Lu rng s c thm Gi blurredngay by gi, nhng tchng ti ch th nghim,n khng quan trng.

S c nhiu hn v causticssau ny trong hng dn. by gi nh rng bncn phi kch hot Gicaustics nu bn mun Gitrough minh bch thng qua

cc i tng.

13. Ti a chiu su

Gia tng ti a chiu sutrong cc tham s vt liuthy tinh n 10, c hai ucho phn nh v refractions.

Bn s nhn thy mt chtdao ng hn trong phnnh / refraction. Trong mts trng hp tng ti achiu su tht s gip ca bn lm cho thytinh nhiu hn thc t. N


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khng nhiu vn mitrng ca chng ti, v ycng l mu en, ging nhmu sc theo li ra khi t

c ti a chiu su. Trongmu ti a chiu su trongmi trng c hiu lc sc thm noticeable.

tip tc, thit lp li vochiu su ti a 5.

14. Ty chn: phn nh trnbackside

i n cc ty chn rolloutknh ca cc ti liu, v bt'phn nh trn backside' tychn. iu ny s cho phpcc bn trong ca mt cng

phn nh mi trng. Khiv knh, bn nn li la

chn ny bt, n to ra rttt p v thc t bn trongthc hnh. iu ny cnglm tng rendertime cakha hc ...

tip tc vic hng dn,ln lt n OFF mt lnna.

15. Glossiness

Glossiness cc tham stng t nh i vi mt
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trong nhng thc hnh. Nc s dng blur ccrefractions. y l mttrong nhng phn ln thi

gian ci t, rendertimes si tht s cao, nu bn sdng cao subdivs ...

Hy th mt gi tr ca 0,8vi 8 subdivs. Bn s thyrng cc blurry refractionsrt n do s subdivs thp.Tuy nhin, bn s c c tng.

Turn the glossiness quay li1,0

16. Index of Refraction

t IOR n 1,0 v v li.Cc torus bin mt! iu

ny l bi v khng nhnc tia bent IOR ny vigi tr. Bi v fresnell IORc lin kt n ccrefraction IOR, iu nycng c thit lp 1,0,iu ny c ngha l s trthnh i tng khng phnqu. Cc refraction mu sc

l hon ton trng, do ,cc tia khng tinted trthnh mt trong hai! Tt cnhng iu ny lm chotorus bin mt.


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17. IOR

Ngng lin kt cc fresnelIOR, do , m gi tr ca

n c t vo 1,6 ln na.S lt truy v li.

Ci m bn nhn thy hinnay l hon ton c to ra

bi phn nh.

18. IOR

t refraction IOR ti 1,1v v li mt ln na.

Mi ti liu c gi tr ringca n IOR. Cng trnh tiu

biu knh gi tr khong 1,6.Do a google tm kim thngthng khc c s dngti liu ca IOR.

V li mt s xt nghimkhc nhau vi cc gi trIOR.

Thit lp li cc IOR n1,6 tip t


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19. Hy thot khi mu sc

Ging nh vi cc phnnh, c cng l mt li ra

mu cho refractions. Sau khi c mt tia refractednhng chiu su ti a sln, i theo li ra mu nys i vo chi. nh duhp kim v cung cp chon mt mu xanh xa. Slt truy v li. Bn c ththy r nhng g cc phnca hnh nh i qua chiusu ti a s (5).

Hy theo li ra mu en li.

120. Fog mu

Cc sng m mu sc

c s dng tint ccrefractions vi mt mu sc.Thicker khu vc s trthnh darker (thm mu) sovi cc khu vc mong. Hyth mt nh sng mu chosng m mu v v li.

Cc ti liu l rt ti tm,

nhng mong phn hin thmt s transparancy.

Cc sng m sng mmu sc v mt s nhnthc s absortion kim sot.nh sng ca n looses
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nng lng, trong khi i dulch thng qua cc ti liu.Cc con n Travels, cng cnhiu nng lng s c

hp thu ca i tng. ll do ti sao mong phn cnli s nh hn cc thicker

phn.

21. Fog h

Thay i fog 0,05 v h s v li mt ln na. Cc

sng m c hiu lc rtnhiu yu by gi, cho thmnh sng qua, kt qu trongmt vt liu nh.

Bn nn th nghim vimu sc khc nhau fog / hratios. Th d, mt nh sng,nhng rt saturated mu vih s cao, hay mt ti

unsaturated mu sc vi mth s rt thp. Bn c th rtkhc nhau, vui chi vi hiuqu ca mi quan h ny.

22. Refraction mu

Bn c th ngh rng, nhng

g ca vic s dng mu screfraction sau ?

Vng, thit lp cc ty chnfog tr li mc nh, vchn mt mu refract. S


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lt truy v li.

Knh l mu qu, nhng mkhng hp thu hiu qu.

Thin thik v bnh ng vicc khu vc c mu sc (cckhu vc ti tm crefractions ca mi trngmu en!).

Ti thng s dng honton trng refract cho musc v ch chi vi cc tychn fog. Tuy nhin, vicc th nghim khc nhaurefract mu / fog ci t xem nhng g h lm. Hynh rng, ti refract mu scc ngha l t minh bch. S

bo ha ca cc mu sc cmt tc ng rt ln v giaodin ca refraction. p rtsaturated mu ti s xem xt

rt ging vi mt mu scrt ti unsaturated trongswatch mu sc, nhng ns c hon ton khcnhau khi s dng cho ccrefract sng m mu hocmu sc. Ch cn th n!

23. IOR = 1,0 pha visng m

Refraction iu chnh ccci t cho nhng ngi bn bn phi. Bng cch phatrn mt IOR ca 1,0 fog


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vi mu sc, bn s c cmt waxy loi nguyn vtliu.

24. Glossiness + IOR = 1.0+ fog

iu chnh glossiness n0,75 v subdivs n 16 vv li mt ln na. Cc tiliu trng ging nh mtcht phn wax.

R glossiness n 1,0 lnna v IOR ti 1,6 trc khitip tc.

25. nh hng nShadows

Mt la chn quan trng,chng ti khng lin lcno c nu ra, n nhhng n cc trngShadows. N s khng chiu qu trong cnh cachng ti th nghim vkhng c nh sng trc tip,ch c nh sng Gi. Nhng
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nh hng n Shadows tychn l ch c s dngtrc tip vi nh sngquang.

V vy, chng ti s thay thcc hp vi mt nh sngVray Arealight. V n to

bng iu khin v chnn, v t trnh ndropdown chnVray.

25. Vraylight

Click vo v ko trong mtviewport to ra nh sngVray ch nht. Hy kch cging nh hp ca chngti, v v tr ca n theocng mt cch. Sau , nhp. t Vraylight ci tnh trong hnh nh bn phi

(nhp vo phng to). Cch s nn c bng vi hs ca cc Vraylightmaterial

bn s dng trnlightbox.

Chng ti gi to ra mtlightsource chnh xc gingnh lightbox, nhng n s

cast raytraced khu vcShadows.


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26. nh hng nShadows

Trong knh ti liu, nh

hng n lt V Shadowsv nhn v li.

Cc hnh nh phi l ca ti.Nh bn thy, n mu xanhl cy casts Shadows. iuny l do nh hng n ccty chn Shadows v sngm mu sc c s dng.

Rendertime tng vShadows l raytrace

27. nh hng nShadows OFF

R nh hng n ShadowsOFF v v li mt ln na.

Thng bo ca cc Shadowsl khc nhau ngay by gi.iu ny l bi v Gicaustics tr li vo chi.Hnh nh ny l th chtng! Khi bn c cc tychn s nh hng n

bng ti ngy, khng crefractive Gi caustics c

tnh cho rng nguyn vtliu, h s c t ng ttca Vray. Cc ty chn lnh hng n bng tikhng c g nhiu hn l'gi mo caustics' ty chn.V vy, hy tng tng
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rng khi s dng cc tychn nh hng n bngti, refractive caustics skhng c tt t ng, bn

s nhn c mt gicaustic hiu qu v thc tGi caustic hiu qu trn utrang ca mi khc! l ldo ti sao Vray s t ngtt Gi lt caustics cho rngnguyn vt liu c nhhng n bng ti tychn bt. iu ny rt quantrng i vi cc HIU!

Hy s dng nhng nhhng n Shadows tychn khi bn mun c nhsng vt qua troughrefractive i tng, v bnkhng mun cho phprefractive Gi caustics, hockhi bn khng s dng tt

c cc Gi, hoc khi bnang s dng ti a nhsng. Ti a n chiu sngs khng bao gi sn xutrefractive Gi caustics! Vvy nu bn mun c nhsng ca n chiu sng tia vt qua troughrefractive i tng, bn

phi s dng cc ty chnnh hng n bng ti.

Th hai, hnh nh bn phil mt OMNI rendered vinh sng nh l chlightsource, v nh hng
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n Shadows ty chn ltt. Thng bo enShadows, khng c nhsng qua cc ti liu.

Th ba, hnh nh c nhhng n Shadows bt. Cmt gi caustic nhng n chiu lc gn th cht ca hkhng chnh xc.

Lu rng Vray nh sng lmt c bit nh sng. Mcd casts trc tip ging nhnh sng n chiu sng tia lm, h lm sn phm Gicaustics (ti a n chiusng khng!). Thng thngch u tin tung ln Gi nhsng (nh nh sng n tskylight v i tng cachng ti nh n lightbox)Gi caustics sn xut.

Nu bn mun thc scaustics ti a khi s dngn chiu sng, bn cn

phi kch hot tnh nngcaustics trong causticsrollout (= photon nh xcaustics). Khng lm ciu ny ngay by gi,nhng caustics kim sotcn phi c hng dn caring mnh ... Ch cn nhrng bn c th nhn chiu qu tt p caustics Gi

bng cch s dng v ddng hn nhiu Vraylights.


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l l do ti sao ti thchbng cch s dng lightboxhoc Vraylight qua ti a

n chiu sng. Bn ch cnkim tra Gi caustics tychn, v bn khng cn phichm sc v caustic khcci t trn tt c cc ni!Drawback l bn cn phic tt Gi ci t cho cccaustics c sc nt,dn n cn rendertimes.

Mt li th ca Vraylightshay objectlights l h phnnh / refract ca i tng.n chiu sng ti a l vhnh v my nh phnnh / refraction.

V vy, tm tt:1. Nu bn ch s dng cci tng v n Vraylights

v bn mun caustics: -

cho php Gi caustics- S dng cht lng

tt, Gi ci t m bocaustics look sharp.

2. Nu bn s dng ti anh sng v bn mun c

nh sng qua refractiveti liu:- S dng nh hng

n bng ti ty chn chomt gi caustic hiu lc

- HOAC caustics bttrong caustics rollout v


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chi vi cc ci t chophoton

nh x caustics.

3. Nu bn s dngVraylights, v bn munphoton nh x caustics:

- V hiu ho nhhng n Shadows

- V hiu ho Gicaustics

- Kch hot causticstrong caustics rollout vchi vi cc ci t.

28. Cui cng ca ti liu

S dng cc ti liu ci tnh trong hnh nh bn

phi. Ti fog gim cc h smt cht, v upped cc gi

tr ca c hai chiu su tia ti 8.

29. Cui cng thit lp hnh nh

Trong irradiance ci t bn , thay i tt c mi th nh trong hnh nh bn phi. Ngra i vo QMC sampler rollout v thay i ting n ngng 0,001 cho cht lng ti

29. Cui cng thit lp hnhnh

Trong irradiance ci t bn, thay i tt c mi th
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nh trong hnh nh bnphi. Ngoi ra i vo QMCsampler rollout v thay iting n ngng 0,001

cho cht lng ti a.

30. Hnh nh cui cng

V li hnh nh, n s trngging nh ti.

Ch p caustics Shadowsv khu vc, kim sot caIR bn ci t. Khng ccaustics c kch hottrong kh khn tm aim, khng c thi gianraytraced Shadows l cnthi

1. So snh vi QMC Gi

Vi t cch l mt thnghim, ti rendered hnhnh vi QMC Gi irradiancethay v bn cho ln utin tung ln. QMC Gikhng phi l mt phng

php tnh tng thch vi

cc bn IRundersampling thut ton.QMC Gi Gi m khng ctnh nguy cho, mi muc nh sng bng s ch. V vy, n l mt th
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nghim tt so snh nhth no vi cc Gi IR l bn tnh.

Nh bn c th nhn thy,trong nhng khu vc cnhiu nh sng chi tit,nhng hnh nh QMC Gi vtt hn (= th cht nhiuhn ng) hn l mt trongnhng bn IR. Nhng

phi mt 10 pht so vi1m24s IR cho cc phin bn

bn ... Nu bn munbit thm chi tit vi Gi IRbn , bn cn phi chnhsa mt s cc ci t bn IR.

32. IR tt hn cc ci t

bn

iu ny cui cng l hnhnh ti u ha IR renderedvi bn ci t. Nh bnc th nhn thy, iu nyn rt gn vi QMC Gi vd, nhng m khng c btk ting n trn sn. Ti sgii thch lm th no tiu ha IR ci t trong mt

bn hng dn, sp ti.


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BAI SO 3

Trc khi bt u

Nu bn pht hin ny Vray hng dn,trang thng qua mt lin kt trc tip hoccc cng c tm kim, xin vui lng lu rng bn ang trn trang 3 ca hngdn! Xin vui lng hon thnh trang utin 1 v 2 nu bn khng lm nh vy.

1. Translucency

Minh bch r rng nh nguyn vt liuthy tinh hoc nc ny s cho php nhsng i qua n undistorted (tr vic undo s IOR). Translucent nguyn vt lius tan nh sng khi i du lch thng quan. V d: Stained Glass, wax, nho, vv ..

Stained knh c th c thc hin viVray bng cch s dng refractionglossiness tham s, nhng wax hay nho vd s cn c translucent khin. Khi sdng translucent kim sot hay khng, lmt, nhng khng r rng.


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Translucency thng c s dng chothc s opaque ti liu, trong nh sngc th xm nhp mt s t xa, nu n mnh. Cc v d c wax, ln da ca con

ngi, cam nc tri cy, sa vv .. Bn cth khng nhn thy thng qua cc ti liuny, nhng nh sng s c th i qua n vmt phn tan xung quanh. V d nh khi

bn nm gi mt en pin mnh di bntay ca bn, mt khc s chuyn mu (mu!) V bn c th nhn thy ni xngca bn c t bi v h chn nh sng.

2. Translucency trong Vray

V translucency c kim sot mt chtl trong hnh vi ng x, ti s khng cgng gii thch chng ... Xem thm giithch k thut c th c tm thy trongcc ti liu trc tuyn, v ti tin tngrng Vray l nhm lm vic trn mttranslucency hng dn ...

Bn c th nhn c rt ging vi cc ktqu v cng cc kt hp khc nhau cacc ci t, nhng m khi nhn thy dinh sng thay i cc iu kin, h s

phn ng rt khc nhau.

Cc translucency kim sot cng ty thucvo refraction fog glossiness v ci t.H lm vic cng nhau, v c bit l

sng m mu sc rt nhy cm l mtthit lp m s c mt drastic rt hiu qutrn cc ti liu. Mt trong nhng iu bns khng bao gilm, l bng cch s dng mu sc m c

mt trong cc thnh phn ci t cho255!!!
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Ti thng ri khi translucency muhon ton trng, cc mu sc refracionmt mu xm c gi tr v sau kim

sot cc ti liu mu sc vi cc diffuse vsng m mu. Sau , vi h s fogtranslucency v nh sng nhn to ra cchiu ng ca nh sng i qua.

3. Da

y l mt ti liu m ln da bn c th s

dng nghin cu cc thng s ci t.Chi vi n v c gng hiu nhng g c hiu lc tng tham s trn cui cng,hy nhn. Lu rng do vic s dng chai phn nh v refraction glossiness, tiliu ny s v li rt chm, nht l i vinhng gi tr cao subdivs.

4. Thit lp li tt c cc ci t t trangtrc

Trong ngy cui cng ca trang trc ,tt c cc ci t c thay i cho

hnh nh cui cng. Chng ta cn phi tn tr li kim tra v li gi tr ngayby gi.

gii quyt vic v li cc ci t hpthoi v thc hin nh sau:- Sn lng kch thc 480 * 360px


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- Ton cu tc: tt n mc

- Hnh nh sampler adaptive QMC- Antialising b lc "Mitchell-netravali"

- V vic gin tip bi ln- Trung bounces h n 0,85- Irradiance bn ci t:


- Mi trng:- Skylight hon ton trng mu- Phn nh / refraction rnh mch en,

h s 1,0

- H thng:- V li khu vc phn chia 50 * 50 px- Khung du: xa tt c ngoi tr cc

phn rendertime

. To mt ti liu c rm

To mt Vraymaterial mi v iu chnhcc ci t nh trong hnh nh bn phi.

y l mt c rm c bn cc ti liu thitlp. Ch nh ti liu ny cho cc itng torus knot v lm bi kim tra mtcch nhanh chng v li. N s ging nhti testimage.

By gi thay i cc phn nh glossinessn 0,7 trc khi bn tip tc.
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6. BRDF

Trong rollout ny, bn c th la chngia blinn, phong hoc phng Shader.

Hiu qu ca ba yu t l loi noticeablenht khi s dng glossy phn nh. V linhng cnh khc nhau vi ba shaders. Ccci t nh hng n cch m ni bt snh th.

Phng thng c s dng cho kim loinguyn vt liu.

7. Anisotropy

Anisotropic phn nh stretched c phnnh trong mt s hng. Bn xem nythng xuyn trn brushed kim loi, v d

bn di nu n pans. Vic ci tanisotropy khin hnh dng ca cc ni

bt.

Cc torus knot khng phi l v d ttnht, nhng bn s nhn c im.

Anisotropy thay i cc thit lp cho -0,6v v li hnh nh. C cn l mt s khc

bit rt ln gia phong / blinn / phng y. Hy th mt s gi tr khc qu (nhv d 0,6).

Xyz cc trc ty chn cho php bn thayi theo hng ca cc phn nh, hocbn c th lp bn s dng mt knh thay th. Cc tham s xoay rotates phnnh nhng
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8. Ty chn rollout

Ln u tin t anisotropy n 0,0 lnna, v cng refl glossiness n 1,0.

Theo di v phn nh truy refractions lkh n gin, chng ln lt, tnh tonn gin, hoc l hai.

Cc tham s cutoff l mt gi tr tresholdcho Vray theo di phn nh bt c tiptc hay khng. Hy th mt gi tr ca 0,7trn hnh nh hin thi. Tng ngng cth tng tc v khi bn ang s dngrt nhiu phn nh trong cc cnh.

i bn: xin vui lng tham kho s tay.

Phn nh trn backside. Chng ti c sdng ty chn ny c trn trang 2 cahng dn ny. Nu bt, phn nh li cho

b mt i mt s c tnh qu.

S dng bn irradiance: nu bn bt ttny, cc bn irradiance s khng cs dng vo ti liu ny. Thay vo , ccti liu ny Gi trn s c tnh vi QMCg. iu ny c th hu ch nu irradiance

bn nh ra khi bng ti blurs chi titv mt s i tng.

i x glossy Gi tia tia nh: xin vui lngtham kho s tay.

Nng lng duy tr ch : xin vui lngtham kho s tay.


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9. Cc bn rollout

Cc bn rollout sums tin ln tt c ccbn khc nhau. Hu nh tt c cc bn

c th c truy cp trong cc thng sc bn rollout (squares nh bn cnh cctham s), nhng mt s s ch xut hin y.

y l nhng tc phm mi bn bn :bump, thuyn, opacity v mi trng.

Bump cho php bn v li irregularities

trong cc b mt bng cch s dng mtbn . Dark cc khu vc trong bn l'thp' cc khu vc, sng cc khu vc l'cao' cc khu vc.

Displacement l nh bng, nhng thay vgi v n, thc t l li bin dng tora mt irregularities. Tham kho s tayhng dn v rng ri cho cc v d vvic thuyn.

Opacity cng ging nh bn ang s dng t tiu chun ti a trong vt liu.

Mi trng khe cho php bn s dngkhc nhau phn nh / refract mi trngcho mi ti liu.

10Phn nh / refract interpolation

Nhng rollouts cha cc tham s kimsot phn nh / refract interpolation. yl nhng ch cn thit nu bn ticked the's dng interpolation' trng trong cc


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thng s c bn rollout. Ti khng khuynbn nn s dng interpolation glossy chohiu qu. Nu bn mun s dng chng,xin vui lng tham kho cc hng dn

bit thm thng tin chi tit

vat lieu co ban

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