Here is the set I've done for my MTC map Velo's Citadel https://trackmania.exchange/tracks/view/31306 (don't hesitate to leave an award if you liked it ;) )
Items might have some shadows issue when not computed.
No texture pack needed, I textured everything with the base custom textures in the game to make it simple.
Base models mainly used for this set : https://www.deviantart.com/crasharki/gallery/57511957/crash-tag-team-racing-models