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.

Core Zero Home.