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