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Re: Rendering ONLY an Alpha Channel

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Steve Bentley
Re: Rendering ONLY an Alpha Channel
on Aug 16, 2017 at 2:27:28 am

Turn off ambient occlusion - that's not doing anything to the edges.
You can also sometimes turn down the anti aliasing or the quality level in the physical render depending on what you need the alpha for.
Both of these speed things up immensely.
You can also turn off transparency, shadows reflections and refractions if you still need some materials for the render but be careful if some of your materials create "holes" in things - you might still need transparency.
Motion blur quality can often be turned down as well depending on the use of the alpha.
If there is a way to not use physical (i've been able to do this a few times for just an alpha) then use another renderer that can use more cores. You might have a kick'n box, but physical can only see two of those cores and sometimes only one.

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