It was initially the idea of   _firestorrm to recreate these blue borders from tmnf/tm2 for tm2020, but then he outsourced the work to me.

-Unzip in \Trackmania\Items

-The border items have a pivot point ("Q" button) to switch between normal platform and black platform height

-loops dont have a pivot but instead b/w backgrounds on the icons for diffrent heights

-the color picker tool can be used for diffrent colors on the border items

This set also contains various platform extensions for curves and corners - sloped and flat for all surfaces

-Included a standard platform piece to move the decals when mixing with vanilla platforms