Hello !
I know there was already a blender addon for Maniaplanet but I just released my blender addon dedicated to TM2020 https://github.com/voblivion/trackmania_blender_addon
It interfaces with current NadeoImporter features including :
- Visible/invisible meshes
- Collidable/non-collidable meshes
- Waypoint triggers
- Wapoint spawn point (with visual for better placement)
- Lights
- Pivots (WIP)
- Materials
- Icon generation (optional)
It generates surfaces :
- connector surface between 4 curves
- top / bottom / side meshes
- many parameters to control
- pivots and UVs generation
It's still WIP, so let me know what feature you think I should add next :) (currently working on set of tools for generating smooth surfaces more easily)
ps: it is not impossible this addon works for blender 2.8 too; let me know :)