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And about the splitting of the terrain. I really considered that but I think that it wont look nice. If I have a straight terrain (no fog) I should see a verry large distance. And if I cut the terrain in small pieces it will just jump out of nowhere when I reach a particular point at which I will draw it. I then thought that i should draw all terrain near my position:
WRT splitting it into pieces
visually there is absolutly no difference, theres no need for fog (things will not jump out of nowhere)
for each patch u test if its bounding box intersects the modelviewfrustum if so draw it.
the only difference WRT splitting it into patches is the framerate will increase 3x in speed (on average)
