CGTalk - Ambient Occlusion Pass White

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mechaniac

07-06-2011, 03:51 PM

hello guys,

I do have a problem with creating an Occlusion pass with the mental ray passes. Ive tried it several times on different projects and it never worked. I always had to go back to using render layers, but I think using a pass would be way more comfortable and I wanted to give it another shot on my current project.
Still no luck. It always renders blank white.
Ive created a testscene with some cubes to demonstrate the issue. As you can see, when using the renderlayer it works fine.
http://data.stan.at/pics/stan.at/temp/AO_trouble/AO_trouble_01.jpg

but when I want to use a render pass

http://data.stan.at/pics/stan.at/temp/AO_trouble/AO_trouble_02.jpg

Anybody knows what this is about?

JWRodegher

07-06-2011, 04:27 PM

brucem91

07-06-2011, 08:22 PM

Have you checked in indirect lighting in the mental ray tabs, that you have ambient occlusion "on"?
If you haven´t checked it, check, if it isn´t "on", turn it on and then test the pass again. It should work.
This will fix it, yes. I am curious as to why you would prefer the AO pass vs a render layer. I always create my AO in a render layer, I personally find I get more control with the mr ao shader vs the pass AO settings.

JWRodegher

07-07-2011, 03:20 AM

If you use the "ao pass" instead of render layer, you get normal/bump/displace detail with it, that's pretty neat. Plus you have less layers in your render setup and narrow down the chances for maya to screw up your scene. That's always a good thing.

mechaniac

07-07-2011, 08:47 AM

thanks guys! that did it!
much appreciated

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07-07-2011, 08:47 AM

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