This has now been resolved (many thanks to Dan, for the weekend customer support).

Alpha transparency is working correctly via Render Network, with C4D files (exported via Render Network Wizard 1.03) and rendered as EXR output.

Any issues with the darker alpha edges are only visible if PNGs are ...

With the ORBX file exported from studio plugin 2024.1.2, I get the full scene options you listed previously and this renders with a perfect alpha using 2024.1 SDK. Job ID: ea5c5860-e675-472b-89f1-8669001db0e6

Issues with the alpha edges when using the Render Network Wizard 1.03.

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'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 ...

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:
https://render.otoy.com/forum/viewtopic.php?f=30&t=84444

Files which have rendered perfectly for me with ...

davidvonbehr wrote: Strange results with your MacBooks :-/

My MacBook Pro M3 Max 40-Core: 15 sec
My Neu MacBook Pro M4 Max 30-Core: 12 sec

I'll have to figure out what's going on there then?

Thanks!

Did you connect both MacBook Pro to power supply during test?

ciao,
Beppe

Yep, Power supply on both (same results whether 'automatic' or 'high power' in system settings).

Standalone 2024.1
M3 Max (Sonoma 14.1)
M4 Max (Sequoia 15.1)

I can't get near 15s with M3 Max (which you have ...

Octane Standalone 2024.1 / OctaneXBench_VolumeDenoiser

MacBook Pro M4 Max (40 core): 18s
(M4 Max with Realtime 16)

MacBook Pro M3 Max (40 core): 22s
(M3 Max with Realtime 19)

spybreak wrote:Not sure if @m0dm0d used that mode,

Good catch, I hadn't spotted 'real time rendering' was on by default for me.
-

Some extras for anyone hanging with PR14 for the time being...

iMac i9 5700XT
https://i.imgur.com/Cna7FT0.png

6800XT (egpu)
https://i.imgur.com/lUtkmfF.png

6900XT (egpu)
https://i.imgur.com/89ZtI3B.png

If you did fancy going with combinations of 2x gpus:

5700XT + 6900XT
https://i.imgur ...