Hello there IX!
These are some TrackWall items with improved mesh/physics! For those of you who despise sliding out on the default blocks these items are based on, you will no doubt enjoy using these in your maps!
The geometry of each of these has been ripped clear of any triangular geometry and subdivided for extra smoothness. (See screenshots 2 & 3)
Unzip to Documents/Trackmania2020/Items. Everything is pre-sorted under "Rexasaurus".
Use this item icon below to distinguish the folder from your other items!
Also check out Rocky's extension to this set:
(Could not find set with ID 11660)