As long as the 2D triangles isn't fixed in tm2 canyon,
here's a small workaround i found:
open trackmania forever
(if you don't have it, download trackmania nations forever)
go to Mediatracker and edit there, save as clip
copy clip from
My Documents - tmforever (or if tmuf TrackMania) - Tracks (clipname.Clip.Gbx)
to My Documents - ManiaPlanet - Replays - Clips
import clip ingame and you're set.
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