Grassy canyon 20 (update 1)

Custom looping pieces and full speed madness.

update 1: fixed collision with grass, fixed weird light on gravity blocks.

rundown: i have made the maps playable in the physical sence but now there is lots of flickering on the grass instead which i will have to tend to later. this means the maps might change a bit.
i will not update the ultra map as that one suffers heavily from the new problems. (should still be playable but its very laggy)