Sounds like a Z-buffer problem.  But that would mean you must have a black plane directly under the green terrain and the two planes are fighting to be on top.  In that case, making your near and far clipping planes closer together would help.

 -Roy

Erdei Mark wrote:

 

Hi!

I am rendering a terrain in j3d which is a TriangleStripArray. The problem
is that if this object is located very far from the origin and has a
relatively small feature size (one corner of this rectangular terrain is at
1621796,6588912 and it consists of 400*400 squares each 4*4 in size), the
rendering contains a regular pattern of black holes. If squares are larger
(100*100 in size)  and the terrain origin is at 160000,300000 the rendering
is correct.
In the you can find a screenshot of this problem.

Thanks,
Mark
 
 

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