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View Full Version : Maya render passes are broken


sharktacos
05-18-2010, 07:14 PM
Doing a simple test I made a torus lit by and single directional light. I then rendered out beauty, diffuse, and spec passes. Theoretically the diffuse and spec when combined should be identical to the beauty (using a plus in Nuke). As you can see below in the attached pics, they do not. The spec on the comped image looks significantly different from the beauty pass from Maya.

Here is the beauty from Maya:

http://forums.cgsociety.org/attachment.php?attachmentid=153425


and here is the comp:

http://forums.cgsociety.org/attachment.php?attachmentid=153428

sharktacos
05-18-2010, 07:35 PM
With further experimenting, this looks to be caused by how Nuke is doing the 'plus' operation. Doing an 'add' in After Effects looks fine, as does a 'linear' dodge in Photoshop. Anyone know how to get the same behavior for Nuke?

sharktacos
05-18-2010, 08:02 PM
Solved it. "video color space" needs to be checked on the plus node in Nuke.
Woohoo, my question has now become a tutorial!

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