This script assigns the Retopology Modifier and interactively updates it.
Works well up to 10.000 polygons, depending on your machine.
Features
– Interactive Retopology based on percentage of the original polygon count.
Install: Drag and Drop to the Viewport
Tested in Max 2024, 2025
Download: https://www.scriptspot.com/3ds-max/scripts/interactive-retopo