AssignSceneMatte
Assigns a matte material to selected objects for use with compositing. Use on objects that are part of your scenery (ie - objects that should receive shadows from non Matte objects such as ground planes).
For a max 5 - 4.2 version of this script - please download bspack_r4_r5_v031.zip. Use the original bspack_r42.zip if you want only max 4.2 compatibility.
The only major differences between script packages are slight version compatibility issues - there are no new scripts added between the 3 packages.