add heights to most of the stein1x textures, and fix inverted normals
-rw-r--r-- 4240 .gitattributes
-rw-r--r-- 27 .gitignore
drwxr-xr-x - env
drwxr-xr-x - maps
drwxr-xr-x - models
drwxr-xr-x - scripts
drwxr-xr-x - sound
drwxr-xr-x - textures