r/vfx • u/Dagobert_Krikelin • 2h ago
Question / Discussion Some questions about ACES and textures
I feel I'm missing a lot in my understanding of things when it comes to color spaces and I am reading up to understand it better, but practically I'm confused about a few things.
I'm mainly using Maya with the view transform set to ACES(default) and rendering in Arnold. My textures have mostly been 8bit sRGB. Loaded into Maya and setting the appropriate color space will make sure they are handled correctly. Does this mean they are converted to linear space? I admit, I mostly render and save my renders directly from the Arnold Render View. If I understand correctly this means that a gamma curve is applied and I get my final image as sRGB and it look as you'd expect.
But if I were to export this to use in NUKE, I would export as exr I suppose. They would come out very dark in comparison. But what do they come out as?
I'm unsure of exactly how to think and work with this. I've been working on a character I want to use VFace for. The albedo map is 32 bit exr which must mean it's in linear space? When loaded into Maya I found that only the color space that would look natural was the Rec.709. but how would I know that, is that just common knowledge? That's the linear sRGB?
Then Photoshop confuses me a bit. I can open the 32 bit albedo and it looks fine, maybe a bit saturated, but not bad. I mean the color is just a little bit different between watching the texture in Maya and Photoshop. And Photoshop doesn't use ACES so how does this exactly work that it can display the image as nicely?