Jungle
My good computer still crashes when first trying to enter Cherika Valley but lets me in if I try 2 or 3 times, it could be a low performance vs high detail combined with lots of people thing. Have you tried a couple times?
Try turning off your Water Reflection from the Video Settings.
Try resetting home and then going home for your characters in the User Panel, then trying to enter the map again. Sometimes a reinstallation helps as that's what I had to do when Chevika Valley kept crashing for me.
Have you tried changing your rendering system again to see if Ficho will work?