Coincidentally, I’ve run into something similar, not on my computer, but on a different one. I’m not sure if Roblox’s ambient occlusion is causing it or is something related to some graphics cards.
If I recall well, the computer in question had an Intel Pentium G3260 with HD Graphics 4000.
I’ve noticed this happening, if you go into free cam mode and zoom all the way in you’ll see shaded lines appear. Seems like its just something wrong with lighting and nothing with the model, as they were appearing on parts.
Hm. We’ve imported similar models to test out and they don’t actually get these lines. We can’t indentify the difference between them that allows the test models to not have these artifacts though. Any workarounds you know of?