Hello,
I have been having this problem since version 5. Meshes and (sometimes some materials too) are not displayed properly in the preview window, though they look good in the viewport.
Attached is an example with a character creator mesh so it is easier to see, but it happens in several different projects from 5.0.3 to the new 5.1.1 version and with different meshes from different sources. The one in gray is the mesh preview while the one in colour is the actual viewport.
Not sure if there is a setting that I need to enable?
Specs>i7@2.5 ghz Skylake, 32 gb ram, RTX 3090
Many thanks
