Progress, progress... Memory leak fixed (finally), most stuff seems to be working Selection edges remain to do, and some other minor display bugs ASSS regions opacity is adjustable (2 different levels, for when Region tool is selected, and for when other tools are selected) With region tool, they also get drawn on top of everything, otherwise they are drawn under tiles. (Thanks Hyperspace for their region-intensive map that allowed me to test ) Also note that this map only takes like 2 or 3 seconds to load, basically as fast as any other map. Some other map with a little bit of everything, notice how the FlyUnder tiles are transparent