Hello there,
It seems to me when I read your question that you haven’t quite grasped the difference between Utility-sRGB-texture and Utility-Linear-sRGB ?
You basically need to use :
- Utility - sRGB - Texture : files with a sRGB transfer function within the sRGB gamut (basically images that you may watch with the Windows viewer, most likely jpgs from Google or Photoshop).
- Utility - Linear - sRGB : files with a linear transfer function within the sRGB gamut.
There is not one better than the other, they just have different purpose.
You could also use your ODT as an IDT to preserve the look but this is not recommended for textures for many reasons.
Did you have a look at these threads ?
- Utility-srgb-texture too dark
- Nuke: sRGB -> ACES -> sRGB = Not the same
- sRGB Textures to ACEScg
- Why RRT/ODT sRGB makes the look darker?
Also if I may, “viewing in ACEScg” is a bit confusing. “That’s how 3D Software will see the textures” is not very accurate neither. A 3d software needs linear textures to compute proper calculation and while they may appear too dark to you, they are probably fine for the render engine.
Happy to help more if you provide more details,
Chris