Is it possible for Karma XPU to use mipmapped EXR textures directly, or will it always convert them to RAT format first? I'm trying to use a custom debug texture that has manually generated mip levels to identify which mip level is being used in the image. This is working in Karma CPU, but XPU is converting the debug texture to RAT and only using the first MIP level when doing so.

Both XPU and CPU should be able to use tiled mip-mapped .exr files natively (it works for me). Can you submit a bug and attach a texture that's not working for you?