OTOY Forums

Hi ,

I am using 2024.1 R2/R3 c4d octane plugin and there is a visible alpha edge on Denoised Beauty. In older versions, this was not happening. I am saving in Octane Exr DWAB.
Any tip on what changed? Do I need to switch something on that I am not aware of? In older version 2023.1.2, the same settings, give correct results in both images.

Thank you

Miki

Hi,

it doesn't matter if the Premultiplied alpha is set to "none" or "encoded", in both cases, the final alpha edge is darker in Denoised Beauty. This was not happening with older versions of octane. With default settings, Beauty and Denoised Beauty had exactly the same alpha on default settings.

I tried multilayered file save and single layers. In both cases, alpha in Denoised Beauty is handled differently as in Beauty.

Then I tried an older octane version and on default settings both images were identical. That means something is different in the newest Octane version. And I can't use Camera Imager/Denoiser till this bug is solved.

Thanks for your effort though.

Best

Miki

Hi Miki,

Dino was able to reproduce your issue, and is related to core SDK, not plugin.
The devs will look into it for next SDK update.

ciao,
Beppe

Hey Guys,

thank you for looking into this. Yes Dino reacted on FB group where I posted the problem too and let me know its caught up.
Very happy to be helpful. Lookig forward for the next version.

BTW: since there are two types of denoise engines now, the second one "Open Image Denoise" doesn't do this issue, only octane denoiser. However, I don't know what is the difference between these denoisers.

Best

Miki

Thank you so much for your reply!

Glad it has been fixed with the new version.

Best

Miki

I’m currently getting this same issue with some files in macOS Sequoia 15.3, C4D 2024.4.1 (and tested in 2025) + Octane Studio 2024.1.2

Also described and said to be resolved here:
viewtopic.php?f=30&t=84444

Files which have rendered perfectly for me with transparency previously are now having issues with 2024(R3) and latest plugin.

Can any devs check or verify this has been updated and is fixed in the latest macOS (Metal) build 2024.1.2 ?

Many thanks!

I've narrowed a few things down - the alpha transparency settings are all working fine and as expected when rendered locally with the latest studio plugin 2024.1.2 (live viewer / picture viewer) giving nice clean results...

The main issue I'm experiencing is when I export anything for the Render Network (using the Render Network Wizard to package the C4D file), rendering 2025.0.2, 2024.5.1 and 2023.2.2... all give me the same visible edge, instead of nice clean transparency.

Works OK with an ORBX file export (to the Render Network), but I've been using the export wizard for animation files recently, as it's been great to handle a larger amount of frames and creates smaller packaged file sizes etc.

I think the issue is actually the 'Render Network Wizard' is not exporting properly and gives this visible alpha edge.
(Render.Network_Wizard_C4D_v1-03)

I am trying to find out if there is a way to use the new open Denoiser node on a Shadow and Light pass to denoise them ?

I looked at the image in this post and do not see how I hook up this feature to get the passes that are currently not denoised.... denoised :>)

Thanks

Peter

Hi.

@m0dm0d:
the issue with render network is that it is currently based on 2024.1 SDK, while the denoised alpha fix has been introduced in 2024.1.1 SDK, so it is not available on render network yet.
Please try to render your scene with 2023.1.3 version on render network and report back, thanks: @Peter:
nice to hear back from you
About new Open Image denoiser and AOVs, please have a look at here:
viewtopic.php?f=30&t=83664#p433908

ciao,
Beppe

Thanks @beppe

I also raised this with Render Network support yesterday (request 280783) and they've been looking into the issue.

I can see a new version has been added to the network options overnight (2025.1.1), so I’ve just tested the 2025.1.1 setting with my existing file (from C4D 2024.4.1).

I can only see 4 options in my Render Network settings (see below - I tested the previous 3 yesterday with same transparency results).

2025.1.1 is still having the same issues for me (with darker alpha edges on output) using Render Network Wizard 1.03.
Job ID: fc148a9e-bed4-4614-8483-1186cf4be30f

I’m waiting to test an ORBX export from the same file, which I believe will produce the correct transparency results, as it did with a different test yesterday (although not a viable workflow for me, as my ORBX file size is very large (even zipped) versus 280mb from the wizard export file). Currently processing Scene ID: 7e46e8cc-cb5f-4eff-8992-83594d2f29ae

I’ve just installed C4D version 2025.1.2, with studio plugin 2024.1.2, Render Network Wizard 1.03, but unfortunately using RNDR 2025.1.1 setting, I'm still getting the same alpha edge issue. Job ID: dbfbfef9-f84b-4fec-828b-7894609dec22