3D英文教程.docx
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3D英文教程.docx
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3D英文教程
Author:
HaoLa
Lightingisoneofthemostimportantpartsin3Dvisualizationrendering.Itbringsnotonlythelookandfeelfortheimage,butalsohelpstovisualizethedesigninreality.Thereareseveraldifferentwaystosetuplightingforarender,however,forL5wesetupourlightingwiththeV-Rayrenderplugin.ThiswasdonebyusingitsEnvironmentandV-Raylightsphere.Wefindthisisasimpleandquiteeffectivewaytolightupthescene.
1.Modeling
TheinteriorismodeledbasedonaCADfile.WeimporttheCADplaninto3DStudioMaxandstarttomodelbydrawingclosedlinealongtheoutlineoftheCADfiletocreatewallsfortheinterior.(Fig01)
Fig01
Afterthat,useExtrudemodifierandapplytothoselinescreatedearliertomakethewall.
Usethissameprocedureforthefloor,ceiling,window,doors,etc.(Fig02)
Fig02
Tip
Itisgoodpracticetonamealltheobjectsinyoursceneandorganizetheminthelayermanager.Thiswillhelptospeeduptheworklateronandalsomakeiteasiertomanagewhentherearetoomanythingsinthescene.
2.AddingDetails
Whenthebasicmodeloftheinterioriscomplete,westarttoputmoredetailsintothescenesuchasthebasearoundthewall,doorframes,handles,windowdetailsandfurniture…toaddmorerealismtotherender.
3.Texturing
Beforelighting,applysomeofthebasicmaterialstothemodelandfurniture.(Fig03)
Fig03
Forthoseobjectsthathavethesamematerialonthem(forexamplethedoors,walls,windowglass),itisagoodideatocollapsethemintoonepieceofPolysoitiseasiertoaccessandkeepthingsorganized.
Note:
WhenusingV-Rayrender,itisimportanttouseV-Raymaterialsforallobjectsinthescene.
4.CameraViewSetup
Viewselectionisoneofthemostimportantpartsinmakingaperfectimage.Trytochoosetheviewsothatitkeepstheimagebalancedanddrawstheviewer’seyesintothemainpartoftheimagethatyouwanttofocuson.
Forthisscene,weinitiallycreatedaround15to20views.Intheend,wechosethreeviewsanddecidedtousethisone.(Fig04)
Fig04
5.Lighting
Beforedoinganylightingtothescene,makesureyouhaveinyourmindwhatkindoflighting/moodyouwanttocreate;shoulditbedaylight,sunsetoranightlight?
Afterthat,itisnecessarytolookforsomereal-lifelightingreferenceimages.Youcanfindthemeverywhere,whethertheyareonlinesources,magazines,orevenyourownphotocollections.
Inthisshot,wechoseamorninglightingmood.Afterlookingatmanyreferenceimages,westartedtolightupthescene.
Startwiththeenvironment/ambientlight.Thiskindoflightwilldecidethelookoftheimagesoweneedtogetitright.Sinceweaimedfordaylight,theenvironmentmustbeslightlyblue.(Fig05)
Fig05
UsetheV-Rayrenderplug-intorendertheimage,utilizingtheEnvironmentcolorinV-RayEnvironmentsettingtocreatetheambientlightthatwewant.Inthisimage,weusedabluecolorfortheenvironmentwiththevalueof8.0.
Exponentialcolormappingtypewasusedforthisimage;Gammavaluewassetto1.5tobrightenthescene,especiallyatthecorners.(Fig06)
Fig06
Weusedaverylowsettingforthetestrenderingofimagesinordertogetaquickpreviewoftheimage.(Fig07):
_Irradiancemapwassettolow
_LightcachewithSubdivsat200andsamplesizeat0.02
Fig07
Atthisstage,we’llbegintotweaksomeofthematerialsbyaddingreflectiononthefloor,woodmaterialonthefurniture,carpet,mirror,etc.
Afterseveralteststogettherightvalueoftheambientlight,we’lladdsunlighttothescene.V-Raylight(spheretypewithnodecay)wasusedtosimulatethesun.Fortheearlydaylightshot,weaddmoreyellow(multiplier3.2)forthesunandalsomaketheradiusbigger(10’)tocreateasoftershadowintheinterior.(Fig08–Fig09)
Fig08
Fig09
5.RenderSettingForFinalImage
Forfinalrenderimagesatthesizeof3000pixels,wechangethesettingsothatitishigherthanbeforetobringmorequalitytotheimage.
ForGImethod,weusedIrradiancemapforPrimarybouncesandLightcacheforSecondarybouncesatahighsetting.(Fig10–Fig11)
Fig10
Fig11
WechooseAdaptiveQMCforImagesamplerandMichell–NetravaliforAntialiasingfilter.(Fig12)
Fig12
Forpostwork,wealsorenderedouttheReflectionpass,SpecularpassandZDepthpass(youcanaddthesepassesbygoingtoRenderElementsandclickonAddbutton)
6.PostWork
WeusePhotoshopforpostwork.LeveladjustmentsandColorBalanceareusedtoimprovethecontrastandcolorfortheimage.
ReflectionandSpecularpassesareusedtoaddmorereflectionandhighlightfortheimagetoprovidemorerealisticeffects.(Fig13)
Fig13
Andthatisaboutit!
Asyoucansee,thelightingsetupissimplebutprettyeffective.However,lightingisnotthemainkeytocreateagreatrender.Itisallaboutthevisual,thecameraview,thematerials,andthestyle.
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