This maxscript allows you to randomly select vertices - faces - and edges of any editable mesh. Highlight the mesh you want and run the maxscript. You can choose a percent of elements you want selected and grow or subtract from your current selection. As in - dial 20% under the vertex rollout - hit select - and you have 20% of the vertices selected for editing. You can add-to or subtract from existing selections also. Works on faces - points - and edges. This is perfect for planet making and terraining.
You can add this to your StudioMax menu buttons by opening this script in the MaxScript Editor and dragging the code into a toolbar. Or - just move it to your 3dsmax6/scripts folder and run them from the utilities menu.
This maxscript was written and tested in StudioMax version 6 and version 3. If you have success or failure on additional versions - please let me know via our help page. The dialog menu lets you control three sub-selection levels of your mesh. A percent spinner dial along with the ability to add or subtract from a selection make this tool very handy for a wide variety of purposes.