Premultiplied alfa in PSD/PSB/TIF

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1. That the issue has not already been disclosed
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All bug reports should include the information below, along with a detailed description of the issue and steps to reproduce it.
A. Operating System, including version (i.e. Win 7, OSX 10.11.2, Ubuntu 14.04, etc.)
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skientia
Licensed Customer
Posts: 225
Joined: Tue Mar 12, 2024 1:50 am
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DinoMuhic wrote: Tue May 20, 2025 10:40 am Can someone sum up what the issue is here exactly?
That the plugin does not correctly render out TIFF with alpha?
TLDR
- C4D plugin issue (other plugins not tested)
- OP seems* to not be able to encode (un/)associated alpha in TIFF (most importantly, and PNG "matte" alpha)
- no issue encountered in Standalone 2024 and 2025 (beta and stable)
- OP's Google drive files available from the links in the replies + reproduced ORBX for the Standalone test scene

* due to the lack of a Cinema4D access, this couldn't be tested and confirmed.
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DinoMuhic
OctaneRender Team
Posts: 189
Joined: Wed Mar 25, 2015 10:24 pm

ok I can confirm that the alpha is missing if "Multilayer file" is checked in the Render AOV manager tab. But only for the Beauty pass itself.
If that checkbox is off, then the Alpha is present (tested latest build and previewed in After Effects).

One workaround until we fix this would be to add an Output AOV with just a Beauty, that will have an alpha. All other AOVs (and the Denoised Beauty too) do have alpha.

Thanks for reporting.
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