32 Bit Texture clamped in Emission Channel

[Yader]

With some of my 32Bit Textures there's a difference in the render between CPU and GPU Mode. It looks like the 32Bit Texture gets clamped. See attached image. Is there a specific way my 32Bit Textures have to be set up, so they work the same in both modes?

[Zom-B]

a great example for the terminator artifact issue.
Please have a ultra high subdivided sphere, instead of this "low poly" one and also give the CPU more time, that should "fix" this issue.

[Yader]

So my CPU render will get darker over time? This was just for demonstration purposes, the content of the scene isn't just a sphere...

[Zom-B]

best to upload the pigs, so the devs have a testscene

[Yader]

Here's the scene as a .pigs file aswell as a C4D scene.
The clamping is very much visible if you look at the light while turning GPU rendering on and off.
Thanks in advance.
https://www.dropbox.com/s/7usvgqrfji17x ... g.zip?dl=0

[Zom-B]

Hey Yader,

thanks a lot for your testscene!

Tested and reproduced your issue. Talked to the devs and it seems this is a "known limitation" that for GPU rendering 32bit emitters (all but EnvMap) get converted to 8bit at the moment, will be fixed in the future...

[Yader]

Hey Zom-B,

thanks for testing, confirming and talking to the devs. I really do hope that this gets fixed as soon as possible