I've tried for ages (since 2010...) to get the VFX studios to work with me on making Krita good enough for their needs. I've visited dneg, worked with Intel and other parties, but in the end, the studios yell they want to get rid of the shared windows/photoshop pc in the corner office -- but don't want to put in any actual effort. In the meantime, we're getting there anyway.

I imagine in bigger VFX companies the texture artists use Windows or Mac and produce the assets for the 3D guys which use Linux.