Using mips for thumbnail generation from Cubemaps is not ideal

[dragonbane0]

Describe the bug As far as I can tell, if a texture has Mips the thumbnail generator will leverage those for thumbnail generation. But this is not ideal for IBL cubemaps as those are pre-filtered for specular, so even LOD 1 is already way too blurry to see anything on the thumbnail.

To Reproduce As mentioned above. It's part of the design.

Expected behavior For cubemaps it would probably be better to always sample from LOD 0. In the absence of mips the thumbnail generator seems to already do that, so a cubemap without any mips will show up fine.

Screenshots First 3 cubemaps have mips, last one doesn't.

Desktop (please complete the following information):

• OS: Windows 11
• Version 3.8