Multi Pass Rendering in Mental Ray - Maya 2011 - 02

[hackneysk8er]

Hi, this tutorial is exactly what I chose to do in one of my VFX Units for Uni. The only problem is that I cant seem to render out a matte pass from maya. Everytime I apply a "matte" pass, all the objects are white and the background is black. How can I control my matte pass and assign a group of objects to their own colour? I know I can only assign 3 per pass but anything will help right now. Thanks -Maik

[guldhaar]

hey - thanks for the answer...but now I've figured it out - the AO pass worked fine, it was I who made a stupid mistake....nothing else

[toolcribtv]

Hello...to make an ambient occlusion pass via the pass layers you have to use the ambient occlusion settings in the render globals rather than a shader...as well these are global settings and I still tend to render out a separate pass with individual AO shaders.

[guldhaar]

hey I noticed you didn't rendered out an ambient pass - is there any reason for that?

- I'm having problems with it myself, it just turns out pitch black - you haven't by any chance an idea on what i'm doing wrong? ( - and yes i have checked the ambient in the render globals )

I could obviously just make an ambient shader and render it out in a new layer - but now I really want to know why the passes wont work...

hope that you can help me. thanks

[Kiyamlol]

hey m8 i was following this tutorial for my project to try and set a single exr multipass, but all my passes are rendering as seperate files. I set framebuffer to rgba float 4x32bit and it still isnt rendering as a single exr :(

Any help would be appreciated thanks!!!~

[toolcribtv]

@Kiyamlol @Kiyamlol hmmmm...I would really have t see the file but here are a few suggestions. Make sure that your project is set, make sure you have exr set in the common tab and like you said you already have the framebuffer set to  4X32. Check in your plug in manager that the copy of exr is working correctly( that it stays checked and does not turn off). That should really be it. I

[toolcribtv]

Thanks for the Nice comments...more tutorials on the way.

[hareljann1]

Very nice tutorial! Thanks!

[bboyalger]

hello my name is "hocine" maya2011 I installed and when I finished my animation Mödling and I did not find the render / image format. "EXR" to which I then combine with nuke or composite. I m really think you found the solution and thank you very much. I await your reply thank you