It’s really annoying having to upload a model to Roblox just to get a usable thumbnail image, especially in my case where I have 50 buildings I need to get thumbnail images of for a game.
Add something like this maybe?
script.Parent.Image = workspace.Model:GenerateThumbnail()
(If you’re interested in my game: https://www.roblox.com/games/1058086953/Strive)