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Philipp Altendorf avatar image
Philipp Altendorf asked

Saving Images with Alpha

Hello community,


unfortunately I could not find an answer for my problem.

I would like to save a .tif file with alpha so that I can get the Alpha from the Channels layer in Photoshop.


If I use Arnold Lights like Pointlight or Quadlight it works perfectly.


But when using Arnold Sky or Domelight the alpha is completely white. When I activate the Matte box of my object in the Anrold parameters, I get my alpha channel, but the beauty rendering is black.


Is there a way to achieve the same as with Point/Quadlights? My goal here is to have just a .tif with an alpha channel to get the cutout quickly and easily in Photoshop. I don't want to work with Cryptomattes and save multi-layered images, because I only render displaced spheres.


Thanks for your time and help!


alpha for geometry
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Peter Horvath avatar image
Peter Horvath answered

You can set the Camera contribution to 0 in the skydome light, but note that it will also remove the background from the beauty (e.g. if you use a texture), so you may need to render twice in this case.

Otherwise I'm not sure you can eliminate the background alpha in one go.

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Philipp Altendorf avatar image
Philipp Altendorf answered

Perfect! That is exactly what I have been looking for. You saved my day! Thank you for your response.

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