Revert "increase region granularity"

This reverts commit de76a4fbfe629cd548e1bb862cac3dcc289d07e4.
Revert "add better cliff rendering"

This reverts commit 84ddaad65cfc70fabd4ccec2780ff596717fe1d5.
Revert "add complex terrain rendering (needs interpolation"

This reverts commit 128999d874b46b8bf88e4bbcfcbaf8745a933867.