Is it possible to render only the alpha pass and skip the expensive color pass? I have tried unchecking the color pass in the render settings but it still renders it before giving me the alpha channel.
Rendering alpha channel only
nPellegrino
#2
Color, zdepth, and alpha always rendered.
You could speed up the render by:
making materials ignore atmosphere and lighting,
turning off lights and shadows,
switching the lighting model to environment mapping,
and in the render settings turn off sub rays and anything that is light dependent.
Unit9
#3
Hi nPellegrino,
Where is the alpha pass stored then? As when I check the Tiff file, there’s no alpha pass included.
Is there something I’ve not switched on?
rbneville
#4
Under render options, select render off-screen or check the box that says "save render to disk, then click options, then you will see a check box for the alpha pass.
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