The current documentation explains what parameters do but doesn't explain how to use them to achieve certain effects. This also should provide a better resource for people wanting to recreate an effect seen on particular mods like cel shading.
[ ] transparency (probably best covered by updating the existing page with examples)
[ ] metals (prm.r = 1 for non skin material)
[ ] skin (just update the existing page with examples)
[ ] anisotropic hair (update existing page)
[ ] specular cube maps (sparkles, glitter, etc)
[ ] diffuse cube maps (update page with trick for spherical meshes)
The current documentation explains what parameters do but doesn't explain how to use them to achieve certain effects. This also should provide a better resource for people wanting to recreate an effect seen on particular mods like cel shading.