Tut Vray for SketchUp 6 part IBi ng trn suvn.net

Bi vit bao gm:

1.S lc2.Hiu chnh nh sng mt tri3.Hiu chnh vt liu4.VrayDisplacement5.HDRI6.Mt s vn khc cn lu

SAu y l phn ni dung S lc

Bi hng dn ny s dng Google Sketchup 6 &Vray for Sketchup 6

*Trc ht ta chun b mt scene n gin,nu mun khi render tng c mu trng,ta phi ph mu trng (vt liu Sketchup) ln tng,nu khng n s c mu vng kem hoc mu xanh tm.

* bc dng hnh cc bn nn lu my diu sau: -Make groupnhng i tng ring bit(vd:ca,sn,mi,tng,..)vMake Componentvi nhng i tng lp li(vd:lam,bc thang) -Qun l nhng i tng bngLayer+Hai vic trn s gip cc bn v nhanh hn , d qun l cc i tng hn ,d gn vt liu hn v cn gip cc bn thun tin hn khi xut file qua 3ds Max render (nu ch Vray Sketchup xu)-i vi knh v cc vt th trong sut (s c gn vt liu vray) th bn nn c gng v sao cho thc(v nh tm knh th phi hnh hp ch khng phi l mt mt phng n thun) v bn nnMake GrouphocMake Componentn li. - to mt scene (tng t camera bn 3ds Max) trc tin bn hy xoay tr model sao cho c mt gc nhn ng nht ri voMenu View>Animation>Add Scene.Khi bn c th xoay gc nhn mi hng v v hiu chnh thai mi,khi mun tr li gc nhn c bn ch cn nhn vo vo tn ca scene trn toolbar.

HIU CHNH NH SNG MT TRI

Trc tin ta hy tm hiu v Vray Sun: Vo Menu Option ca Vray Sketchup trn thanh Toolbar ,s xut hin mt bng,lm theo nh sau:

Environment :GI v Background u chn Sky,chnh theo thng s trong hnh

Shadow bias: lch tia ca bng .Ga tr ny nh th bng c ko di ra thm,gi tr qu cao bng nh b tch ri khi vt th.

Photon radius:bn knh pht ra cc photon nh sng.

Turbidity:s lng bi trong bu kh quyn,nh hng n mu sc bu tri v nh sng mt tri.Gi tr nh cho bu tri trong xanh,nh sng mt tri ging vng qu.Gi tr ln lm cho bu tri cng tng sc vng cam nh cc thnh ph ln.

Ozone:nh hng n mu sc nh sng mt tri,nh nht l 0 v ln nht l 1.Ga tr nh cho nh sng mu vng,gi tr ln cho nh sng mu xanh hn.

Intensity Multiplier: chi ca nh sng mt tri.Trong trng hp nh sng mt tri b chi,bn hy gim bt thng s ny.

Size Multipier:kch thc nh mt tri,ch cn thit khi cn c s xut hin ca mt tri trong bc nh(nh bu tri,mt bin).

Shadow subdivs:iu khin s lng sample ca bng ,gi tri cng ln bng cng cht lng nhng thi gian render li tng ln.

Chnh theo setting di y:

Sau khi chnh cc thng s cc bn c th render (setting ny ch l tham kho ,trong qu trnh thc hnh bn s tm ra nhiu setting khc p hn).Lu :khi cn render nhiu gc cu mt cng trnh, tit kim thi gian,bn nn save 2 file tnh tan Irradiance v Light cache (hay c th l cp engine khc) sau ln render u tin,nhng ln sau bn ch cn load li 2 file ,khi Vray ch tn thi gian render nh m khng phi tnh li ln na (vi iu kin khung cnh khng c g thay i v hnh khi ln vt liu v nh sng,nu khng Vray s phi tnh li t u) nhng cc bn ch ,cch ny i khi cng b li.Vray Sketchup cn c li im ch bn c th bn c th Save v Load setting(.visopt) c th xi nhiu ln cc bn v khc nhau.

HIU CHNH VT LIU

Phn nh sng tng i n,ta s tm hiu v cch p vt liu cho cng trnh .Ta c th dng c hai lai vt liu :vt liu Sketchup (SU) v vt liu Vray p cho cng trnh.Trong trng hp dng vt liu SU thng l vt liu tr nhng ta mun chng c tnh cht vt l c bit nh phn chiu,trong sut. g gh(Bump) ta s bin chng thnh vt liuVrayLinkedMtl(vt liu lin kt gia Vray v SU).

Vt liu Vray thng c 4 lp (layer) con:

-Diffuse Layers:mu bn thn

-Reflection Layers:phn chiu

-Refraction Layers:khc x,trong sut

-Emissive Layers:t pht sng

Mun to lp con,ta Right Click vo lp ri chnAdd new layer

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