What is the difference between sheen.ktx2 and diffuse.ktx2

Hello

Notice that we have a separate ktx2 image for sheen on each environment map. Is there any difference between the sheen version and other one for the same environment map?

I thought all of them are the cubmap version of the HDR environment map, with mipmap level matching to different roughness.

Sorry for this newbie question. Just want to understand the sheen extension better.

Thank you

Compare the environment files named sheen.ktx2 and diffuse.ktx2 for the same environment map, then read the sheen extension documentation referenced by the project. Done means documenting the difference between the two textures and clarifying how their mipmap levels are used.

Written by the indexing model from the issue text.