Hello,
I noticed that in the latest 2025 and also the new 2026.1 octane plugin version there is a bug when rendering with/without straight alpha. The colors are shifted heavily.
Also, when I load up my file, start the picture viewer, it all looks as desired(lighter version). When I then render via shift+R, it renders the darker version. After rendering, when I switch to the live viewer again, the live viewer now shows the darker version. What is happening here?
Windows 11
RTX4080 Super 16 gig
581.57 nvidia Driver
2026.1 c4d
C4D 2025.3.3
Straight Alpha Render Bug
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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)
Bugs related to the Octane Engine itself should be posted into the Standalone Support sub-forum.
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.
I. Copies of the Octane Log window and Console window outputs (full text attached as a file to your post is recommended).
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.
Hi,
Please try to disable C4D Save options, and save your results via Render Settings/OctaneRender/Render AOV Manager tab.
You need to enable the Save Beauty option, and/or Denoised beauty option if necessary:
About Straight Alpha option, in OctaneRender you need to check the "Disable partial Alpha" option in Imager node:
About Picture Viewer result, try to set the View Transform popup to OFF.
ciao,
Beppe
Please try to disable C4D Save options, and save your results via Render Settings/OctaneRender/Render AOV Manager tab.
You need to enable the Save Beauty option, and/or Denoised beauty option if necessary:
ciao,
Beppe
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Visutainment
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- Joined: Tue Feb 28, 2017 1:15 am
Thanks for your reply. I need the C4D saver because in the Octane saver there is no possibility to export TIFF with LZW compression, which my client requires. I need to render hundreds of pictures and can not always manually save every single render in Photoshop as LZW.
Damn, good point!
Maybe you can create a Photoshop droplet to automate the compression process.
ciao,
Beppe
Maybe you can create a Photoshop droplet to automate the compression process.
ciao,
Beppe