STEP by STEP Cre­ate MATTE SHAD­OWS AND RE­FLEC­TIONS WITH V-ray

3D World - - ARTIST Q & A -

01To SET up your view­port

set the cam­era an­gle cor­rectly we need to im­port the back­ground pho­to­graph as a ref­er­ence. In 3ds Max’s top menu, go to View>view­port Con­fig­u­ra­tion. Se­lect Use Files. Browse for the back­ground im­age, click on Match Bitmap and Ap­ply to Ac­tive View at the bot­tom. In the ac­tive view­port right-click over the view name and se­lect Show Safe Frames. Open the Ren­der Setup di­a­logue and ad­just Im­age As­pect un­til the view­port matches the back­ground pho­to­graph.

02 CRE­ATE the CAM­ERA

Put a new V-ray Phys­i­cal Cam­era into the scene and ad­just the fo­cal length to match those in the pho­to­graph de­tails. Cre­ate a sim­ple rec­tan­gu­lar ob­ject to rep­re­sent the ta­ble top in the scene. In the ac­tive view­port change the view to Vray­cam and ma­nip­u­late the cam­era un­til the ta­ble top ob­ject ap­pears to sit di­rectly over the ta­ble top in the back­ground pho­to­graph.

Add the light­ing as de­scribed in the in­tro, and (by ref­er­enc­ing small test ren­ders) ad­just the cam­era speed and ISO set­tings un­til you get good-look­ing re­sults.

03 MATTE SHAD­OWS

Cre­ate a Vraymtl­wrap­per tex­ture in the ma­te­rial edi­tor. Tick ‘Matte sur­face’, ‘Matte for refl/refr’, ‘Shad­ows’ and ‘Af­fect al­pha’. Add a Vraymtl to the Base Ma­te­rial slot. Raise the Re­flec­tion pa­ram­e­ter in this by mak­ing it whiter, un-tick Fres­nel Re­flec­tions and ad­just the Hglossi­ness and Rglossi­ness. These set­tings will de­pend on the par­tic­u­lar look you are aim­ing for. As­sign this ma­te­rial to the ta­ble top ob­ject.

04 COM­POSE in Pho­to­shop

Ren­der the scene at the ap­pro­pri­ate size and out­put to a PNG for­mat with ‘Al­pha chan­nel’ in the Setup box ticked when the Save Im­age di­a­logue opens. Open up the orig­i­nal photo and the new PNG im­age in­side Pho­to­shop. Copy and paste the PNG im­age onto the orig­i­nal photo and move it around into the cor­rect po­si­tion over the ta­ble. Ad­just the lev­els, hue and ex­po­sure set­tings to im­prove the match.

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