Only tested on 3ds max 2018
For now, this script supports :
Corona Mtl
Corona Layered Mtl
3ds max bitmap
CoronaBitmap
CoronaNormal
Corona Front/Back
1 - Copy and paste "scripts" and "UI_ln" folders in "C:\Program Files\Autodesk\3ds Max [version]"
2 - Drag and drop CoronaToClarisse.mcr in 3ds max
3 - Go to Customize/Customize user interface -> Toolbars -> Category : CoronaToClarisse and drag and drop it in a toolbar
1 - Add a new item in a shelf
2 - Scrit path : ClarisseImport.py
3 - Icon -> Custom -> CoronaIcon.png