I have had an issue with Roblox Studio today. Yesterday, I had beautiful lighting and shadows in studio, but now today, it does not. I cannot tell if this is Roblox, or my Laptop causing this issue. I did not have any laptop updates between yesterday and now.
Okay so I found what was bothering me. Apparently in Studio Settings, the Vulcan rendering system was not available for some reason. But now it is, and setting it to that fixed the issue. If this applies to anyone, I found the issue.