The sky is a shameless rip from raft's work on Aptal Karga...didn't i gave credit before? I guess, i've forgotten...shame on me...
However, here's the file:
http://www.jpct.net/download/misc/terrain.zipAs said, it's pretty hacky. Especially processing of the trees and generating the terrain texturing could be improved. Sources are included, i've put everything into one, uncommented (almost) file. It needs the jpct.jar that's included to run, it won't run with 1.19, because it uses some stuff that i've added for 1.20.
There are some keys:
1+2 : Move the sun. The lens flare doesn't take the mountains into account for performance reasons.
t: toggle trees (on by default)
d: toggle detail mapping (off by default)
CRSR+PGUP+PGDOWN: move
ESC: Exit
FPS will be printed to the console each second.
Edit: Performance on my main machine (Core2 Quad@3.2Ghz, Windows Vista Ultimate 32bit, 4GB, Ati Radeon HD 5870 - 1GB, Java6.something) at the starting position without moving the mouse.
With trees: 83fps (was 55 before optimizing...)
W/o trees: 1200fps
Edit2: Performance on my test machine with Intel onboard graphics (Core2 Duo@2.2Ghz, Windows XP, 2GB, Intel 945G, Java6.something):
With trees: 10fps
W/o trees: 31fps