Loop Straighten with Constraints

"Loop Straighten with Constraints" is a script which lets you straighten one or more selected edge loops. However, unlike Maxs built in Loop Tools Straiten function, it works with geometry constraints (edge constraint, face constraint, and normal constraint).

The script can be run on Editable Poly and the Edit Poly modifier, and works in 3DSMAX 2012-2019 (may work with other versions but has only been tested for those versions listed).