environment shader type

***NORMAL: 
Base map:
--is the diffuse color and basic details of the texture
--its alpha masks the primary detail map, but not the secondary detail map
--I think you'd use different base maps to do regional pallets like... cliff_rainy, cliff_frozen, cliff_inDesert, cliff_mossy?

Primary Detail map:
-- ...Maybe the stock detail maps are monochrome because the base map determines the color?
-- Haven't tested how this works at different viewing distances...edit: viewing distance doesn't affect this
-- Its alpha controls where the bump map can appear! 
Secondary Detail map:
-- Adds general detail to the base map
-- It LOOKS like its alpha determines how strong the cubemap should be.

Micro Detail map:
-- These are up-close-and-personal details you find standing right next to a wall or something
-- I don't know how its alpha works, !!!

Bump map:
-- When alpha tested is active, alpha from the bump map determines transparency for the entire texture, like a ladder or a grate.
-- When bump map is specular mask is active, a greyscale map that is placed here will determine how strong the cubemap should be. Maybe I should see how it looks like if I put some metal scratches here and use a metallic texture as the base map..
-- usually adds bump the texture