Reverted accidentally commited s/512/1024/ in size of y order buffer.

tilemapper/main.go

@@ -71,7 +71,7 @@ func main() {
 	q2x, q2y, q2z := q1x+int16(width)-1, q1y+int16(depth)-1, q1z+int16(height)-1
 
 	renderer := NewRenderer(q1x, q1z, width, height)
-	yOrder := NewYOrder(renderer, 1024)
+	yOrder := NewYOrder(renderer, 512)
 
 	numBlocks := 0
 	drawBlock := func(block *common.Block) {