Actually fixed the lighting for the bag (finally), and tested that that stops glowing in shaders!

This might have been fixed by #113 . Should test both before and after to see if this fixed things, made things worse, etc.

Not fixed by #113 . Going to move this out of 1.3.2, since shaders are fun to deal with lol

Looks like I had never updated the bag model to actually use the lighting nearby. Should definitely do that.