question

Hamad Alateeqi avatar image
Hamad Alateeqi asked ·

alpha channel all white in arnold render

trying too render in arnold and for some reason that's what I get for alpha channel which I can use for compositing

screen-shot-2019-04-28-at-42400-pm.png

this what I get when composite

screen-shot-2019-04-28-at-42413-pm.png

arnold
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What is your Skydome Camera Visibility set to?

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I will send the screen shots

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Do you have a background or image plane on the camera?

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Hamad Alateeqi avatar image Hamad Alateeqi Ashley Handscomb Retallack ·

I will send the screen shots but camera image plane is non and the SkyDome camera is 0

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I will send the screen shots

camera is 0

screen-shot-2019-04-29-at-35459-pm.png

and for the image plane for the render camera is non

screen-shot-2019-04-29-at-35618-pm.png

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Stephen Blair avatar image
Stephen Blair answered ·

If you have an image plane, it's because of a known issue with image planes and the alpha channel.

A possible workaround is to put this in the Render Settings > Diagnostics > User Options:

background_visibility 0

This issue will be fixed in the next mtoa update.

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