Hi! With "Did you accidently assign the body material to the glass mesh as well?" I meant if you assigned the wrong material to the glas mesh "Body_up_scr_low" inside Toolbag. Here I assigned the body material "Main" to it and the result is similar as in your screenshot above. For the maps export from Painter, I chose the…
Hm, can't reproduce your issue. Did you accidently assign the body material to the glass mesh as well? Here is how it looks in Toolbag on my end (flipped normal map Y). For the glas material setup, I would read some tutorials.