The r|shaders pack from Core Zero brings some beautiful procedural shaders to 3ds Max, and has just enetered Beta 1.5. In addition to this milestone, they are running a promotional 50% discount sale through February and March in preparation for release soon afterwards.
Currently 7 shaders are operational (ice, ocean, deep ocean, sand, snow, ice land, and snow land) with 2 more to come prior to release (magma and ground). The results are amazing, and their website has detailed examples of both the UI and results for each shader.