I have seen this question asked frequently, in fact I asked it last week. I
have not been able to find an equation for TexGenCoord which will handle
this mapping. Instead I calculate the texture coordinates when I create the
triangles. Do you want a drape or tiles? Drape is easier (this stretches
the texture over the entire terrain) But I have found that the larger you
stretch it, the slower is the rendering (just my observation). You can also
create tiles by creating a wrappable texture and then increasing the texture
coordinates beyond 1.0 An easier way is to map the coordinates between 0
and 1, but use a transform on the texture, but I have found this has
performance problems on large terrains.
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