Alpha of the paint shader (i.e., plate in the fruit scene)

#1

I remember a couple people in the class had issues with the paint shader used on the plate, in that its alpha was black wherever the environment was reflected. So did I. Enclosing your scene in a simple sphere would fix it. Or, for a solution I picked up at lamrug that makes a little more sense (it really doesn’t make any sense at all to be passing on the alpha from reflections, even if the reflection is the empty environment…), enable “pass custom alpha” under ‘custom entities’ in mental ray globals.

Anyway, just thought I’d point out that alternative fix. It can get a little annoying working in a sphere-enclosed scene. :wink:

#2

That’s good to know.

Although, in the future if you do render an alpha channel with a reflection pass, you usually would want the alpha to show where the reflections are, rather than showing the opacity of the whole groundplane receiving them. (This is just for future reference, in this assignment we don’t even need to use alpha channels, and I’m only interested in seeing the RGB.)

-jeremy

#3

This thread has been automatically closed as it remained inactive for 12 months. If you wish to continue the discussion, please create a new thread in the appropriate forum.