I have one major problem playing Sundog emulated: When I move around on the planet surface the screen doesn't refresh properly. It's hard to explain. In the direction where I move the terrain comes more or less properly, but the area I'm moving away from some blocks disappear altogether though they should still be on the screen while others are duplicated. For example if in the starting city I move a couple of squares west, there are two of my spaceships on screen, one of them in the middle of the refueling station! I've tried both STeem and PacifiST with two different copies of the game.
Severe Sundog problem 
