When I travel, I allways see the surrounding area like this:


It's strange, I can see far away mountains and terrain perfectly bright, but as I arrive there, it becomes darker and darker, until I cannot see nothing under my feet.
And it only affects grass and mountains, outer terrain. When I am in a city, or over a stone path, it looks perfectly normal.
I have seen the FAQ, have tried the "-fullbright", have updated graphic card, have updated DirectX, have reinstalled the game, but there is no way to fix it.
The computer is a LapTop, running Windows XP, and graphic driver is Mobile Intel 945GM/GU Express Chipset Family.
It's not critical, I can play, but it's terribly annoying, I cannot see how is the terrain, and so I do not know when I can clim it or not.