Single sprite

e#: sprite {
			x_base: 64; y_base: 0;
			file: "../sprites/terrain/groundtiles/cornerhighlight8bpp64_masked.png";
			width: 64; height: 64; x_offset: -32; y_offset: -33;
}


Row of sprites

(n#Nt,  n#Et,  n#St,  n#Wt) : sheet {
			file: "../sprites/terrain/groundtiles/borderhighlight8bpp64_masked.png";
			x_base: 0; y_base: 320; x_step: 64; y_step: 64;
			x_offset: -32; y_offset: -17; width: 64; height: 64;
			mask: bitmask { type: "voxel64"; x_pos: 0; y_pos: 0; }

Lots of rows of sprites

		(n#,   _n#,  _n#,  _n#
		|n#n,  n#e,  n#s,  n#w
		|n#ne, n#es, n#sw, n#nw
		|n#ns, n#ew, _n#ns,_n#ew
		|n#nes,n#esw,n#nsw,n#new) : sheet {
			file: "../sprites/terrain/groundtiles/borderhighlight8bpp64_masked.png";
			x_base: 0; y_base: 0; x_step: 64; y_step: 64;
			x_offset: -32; y_offset: -33; width: 64; height: 64;
		}