Thank you for reading this post!
I was working with BillboardGuis recently when I discovered a bug after I set AlwaysOnTop to false,
The frame on the left has AlwaysOnTop set to false and light influence at 0. The frame on the right has AlwaysOnTop as true and the same light influence.
Setting light influence to 0 should take all light effects away from the frame (including shadows), this doesn’t happen currently and is flushing out images turning them from white to grey making them look duller than they should.
Edit: I reproduced this bug with SurfaceGuis as well, setting the light influence to 0 doesn’t stop the lighting from turning the color grey.