Very Strange shadows or textures appearing in my building

Hi there, recently I added a roof to my bank and a large surface light. For some reason, there is this really strange glitch:

I have no idea what it is or how to fix it - it looks baked like a texture to me, since none of the lines move when you get closer. I can’t post in engine bugs so I’m posting here. Thanks!

Probably nothing to do with it. Roblox has a lot of problems with this problem at this time. You must wait until the next update. I can’t help you.