Premultiplied alfa in PSD/PSB/TIF

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Before posting a bug report, please check the following:
1. That the issue has not already been disclosed
2. That the issue is specific to this plugin, and not Octane in general (Try reproducing it in Standalone)
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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.)
B. Graphics Card(s) model (i.e. GTX 580 - 3GB, TITAN, etc.)
C. RAM Capacity (i.e. 6 GB)
D. Nvidia driver version (i.e. 7.50, 7.5.22)
E. OctaneRender Standalone version, if installed (i.e. 2.24.2, 2.23, etc.)
F. OctaneRender plugin version (i.e. v2.25 - 2.21)
G. Host application version, including build number if available (i.e. 3ds Max 2016 Build 18.0)
H. A detailed description of the issue and steps to reproduce it (Include Screenshots or video capture), as well as an example scene if applicable.
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Please note that reports of issues inside existing threads will be ignored/removed, and reports may be closed if the reporter does not respond to subsequent queries in the thread.
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mikler
Licensed Customer
Posts: 4
Joined: Tue Nov 29, 2022 11:15 am

Win 10
GeForce RTX 4090
RAM 128 Gb
572.60
-
2025.1
Cinema 4d 2025.1

Starting from Octane 2024, It stopped recording Premultiplied Alfa in PSD, PSD and TIF Beauty layer. It writes to PNG from the same file as before.
That is, in PNG I get a file with a transparent background in the right places, if the glass is semi-translucent, then the alpha will be appropriate. And in PSD and others— the beauty layer is just on a black background, the alpha is nowhere to be found. At the same time, alpha is present only in the Denoise Beauty layer.
mikler
Licensed Customer
Posts: 4
Joined: Tue Nov 29, 2022 11:15 am

Maybe I didn't explain it correctly.
That's what I mean.

Scene Settings #1
https://drive.google.com/uc?id=1eSSiZMP ... QaSvY03k6i
What I see in Photoshop
https://drive.google.com/uc?id=1M6RN6XV ... fOkClkmTW_

Scene Settings #2
https://drive.google.com/uc?id=1Mku4fzm ... Ux-Fex9gB-
What I see in Photoshop
https://drive.google.com/uc?id=1L8Q9Kri ... _Swv2Z6p-N
I see the same in TIFF and PSB.

Here is the scene:
https://drive.google.com/drive/folders/ ... 7aUY-joGJg

I hope it's clear now.
mikler
Licensed Customer
Posts: 4
Joined: Tue Nov 29, 2022 11:15 am

skientia wrote: Mon May 12, 2025 2:15 pm Blank test project file In Octane Standalone 2025.a beta 1, the TIFF results are as expected (working, no issue whatsoever).
Exporting the Cinema4D project file as ORBX to import in Standalone for testing purposes would be informative. It would double-confirmed the issue is C4D Octane related.
YES! I think you're kidding me. I asked a question specifically about C4d Octane, not about Standalone. Especially not about the beta version Standalone. I hope you'll fix the problems of recording alpha in TIF and PSD in the C4d Octane in the next update. Thanks for the helpful advice about ORBX. :lol:
DinoMuhic
OctaneRender Team
Posts: 215
Joined: Wed Mar 25, 2015 10:24 pm

Can someone sum up what the issue is here exactly?
That the plugin does not correctly render out TIFF with alpha?

Its a bit hard to follow this thread.

Cheers
DinoMuhic
OctaneRender Team
Posts: 215
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.
ChrisHekman
OctaneRender Team
Posts: 1093
Joined: Wed Jan 18, 2017 3:09 pm

mikler wrote: Fri May 09, 2025 11:28 am Win 10
GeForce RTX 4090
RAM 128 Gb
572.60
-
2025.1
Cinema 4d 2025.1

Starting from Octane 2024, It stopped recording Premultiplied Alfa in PSD, PSD and TIF Beauty layer. It writes to PNG from the same file as before.
That is, in PNG I get a file with a transparent background in the right places, if the glass is semi-translucent, then the alpha will be appropriate. And in PSD and others— the beauty layer is just on a black background, the alpha is nowhere to be found. At the same time, alpha is present only in the Denoise Beauty layer.
Which version of the plugin where you using where it worked? I tried a 2024.1-R2 and it rendered out completely black, which I dont think is what you want either.
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