Difference CPU render and GPU render

[wawaron94]

We know that the CPU rendering incorporates denoising while at the moment it is not available for GPU rendering. On the other hand it seems that the color temperature of the environment is different, do you know why?

[wawaron94]

first image: CPU render 500 samples denoiser 4 = 16min with i7 7700k

second image: GPU render 500 samples = 6 min with Quadro RTX 4000 

[Ares Hovhannesyan]

Is this screenshots from Stager after final rendering or exported file? 

[wawaron94]

Hi Ares,

it's a render file not a screenshot

[JMathews]

Interesting, these look quite different.  I'll tag the team to do some testing on this, the expectation is definitely that they should be the same.  Do you happen to have the scene saved you could send me?  You can email it to me at Substance3D-bugs@adobe.com via a share link if you have it, just so we can look at your exact setup as well.

[wawaron94]

Hi, 

I turn the pc back on and I send you just now the link with the stager file. or I too am surprised by this difference, but in the end maybe not in any case the GPU rendering is very good even if the denoising is not yet present. See you again

[Ares Hovhannesyan]

I have similar issue with PNG files rendered in Dimension ans Stager in case I review them in Win Photo Editor (more darker). If they are reviewed in PS no difference are found. IMHO that can be difference in gamut range (color profile) than Win and Ps using. May be that can be a reason in your case.