Not sure if this is a bug, or something that needs tweaked, or some memory dump or what but I noticed that the Tree Shading takes a rediculous amount of system resources causing a drastic drop in frames per second. This doesn't happen everywhere in the world, but it is most noticable on the sides of mountains where the tree shadows stretch forever down the mountainsides. Now before someone posts "your comp just isn't good enough for shadows turn them off" lemme point out several things..
1) This memory loss only happens on Tree shadows, I have every other video setting maxed and run about 120-150 FPS with tree shadows off and drop to 12-20 with them on. This isn't normal.
3) My computer can run any game currently on the market with max settings with no difficulty, and in some cases even run 2 copies on max.
3) I have checked to ensure every driver on my system is the most current version available.
My system is as follows.
8 gigs of DDR3 PC1333 Ram
MSI 790FX-GD70 Motherboard
Phenom II Black Edition 3.4 quad core processor
After encountering this issue I tried overclocking my Ram, Video Card, and Processor and still encountered the same issues. I have a hard time buying this is something on my end. No offense intended but there are games out right now which are much more graphically intense then Xsyon and I can play them max everything with no problems at all at a healthy 60-80 FPS. Tree shadows shouldn't justify a 100+ point fps loss.
Hopefully you can figure something out with this. I'll try and get in game and find some specific locations where the fps drop becomes unbearable to post them.