I played this on a server, it was quite fun.
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I made a new version for the map, I didn't change any edge that could change the contact with the player.
v0.3:
modified some polys to slightly fix the coloring
added rocks scenerys on the bottom, there was colliders but no scenery
changed a lot of scenery from back to middle and the upper center "bridge" from middle to back
made the central bottom rock (collider) brighter
added a black scenery on the center bottom, to make a better contrast
added dark polys on the center, where you can walk
background slightly brighter
right flag light slightly bluer
one or two scenerys of the forest in the middle changed opacity/brightness