I made angled glass models 8") Sometime ago I really needed this now I know how make simple models!
Open data folder add this
mmodel "zam/glazzangle"
mmodel "zam/glazzangle2"
mmodel "zam/glazzangle3"
mmodel "zam/glazzangle4"
to the bottom line of default_map_models.cfg
Updated
added a environment setting and changed to a lighter glass for darker maps any opinions would be good!