offset = 
edges_offset = 7483


SLOPE_FLAT
edges:			7483, 7484, 7485, 7486
corners:		7487, 7488, 7489, 7490
cornerswater:		7491, 7492, 7493, 7494

SLOPE_SE
edges:   		7495, 7496, 7497, 7498
corners: 		7499, 7500, 7501, 7502
cornerswater:		7503, 7504, 7505, 7506

SLOPE_NE
edges:   		7507, 7508, 7509, 7510
corners: 		7511, 7512, 7513, 7514
cornerswater:		7515, 7516, 7517, 7518

SLOPE_SW
edges:   		7519, 7520, 7521, 7522
corners: 		7523, 7524, 7525, 7526
cornerswater: 		7527, 7528, 7529, 7530

SLOPE_NW
edges:			7531, 7532, 7533, 7534
corners:		7535, 7536, 7537, 7538
cornerswater: 		7539, 7540, 7541, 7542

SLOPE_E
edges:			7495, 7508, 7485, 7486
corners:		????, 7512, 7489, 7502 < 7499/7511
cornerswater:		????, 7516, 7505, 7506 < 7503/7515

SLOPE_S
edges:			7483, 7520, 7497, 7486
corners:		
cornerswater:	

SLOPE_W
edges:			7483, 7484, 7533, 7522
corners:
cornerswater:

SLOPE_N
edges:			7531, 7484, 7485, 7510
corners:
cornerswater: