When you take a union with a decal and parent it to a character, the decal will disappear entirely or be very hard to see, depending on the unions color/material. Problem with both legacy and voxel lighting.
https://gyazo.com/46855e9cf27ed86375e727f263bce335.gif
decal bug repro.rbxl (187.5 KB)
Do you think this is distinct from this issue? Humanoid shadows don't know how to handle decals within character - #2 by E_3D
Maybe. I noted odd shadows like that on parts at times but never to the point of decals entirely disappearing.
I’m having the same issue.