Thanks for sharing the data. I could use GPU rendering on a mac pro, but on a mac book air m2 I got this error:
[VTK] Invalid texture dimensions [447, 318, 2308]
[FD] UNSUPPORTED (log once): POSSIBLE ISSUE: unit 1 GLD_TEXTURE_INDEX_3D is unloadable and bound to sampler type (Float) - using zero texture because texture unloadable
so it must be a hardware or driver limit, probably to 2048 max dimension
I used CropVolume with a 1.5x multiplier on the spacing and then GPU rendering worked on the m2 machine:
