Compositor and certified Nike Trainer, Erwan Leroy thinks some things in Vray are easy. Yet, some other things, might be a bit convoluted, and needs more of your attention. You can find plenty of tutorials that cover creating custom render passes in VRay. There aren’t a lot of tutorials that cover creating a (Pref) position reference pass.
As a compositor, Erwan used position reference passes all the time. The only mystery seemed the “how” with Vray.
Position Reference Passes
A popular render pass is the Pworld pass. It can also known as Position World Pass, XYZ, or Point Position. What ever it’s name, a Pworld can be for relighting or pt make position based mattes. The Pref, or Position Reference can look a lot like the Pworld, but the colors “stick” to moving objects.
Check out Erwan Leroy’s article that shows how you can Create Position Reference (Pref) Pass in Vray for Maya.
Erwan Leroy
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