Wasn't it Mienai who wrote:
>So I have a bicubic patch and I'm trying to apply two marble pattern
>textures to it with uv mapping, one rotated 90 degrees from the other.
>Unfortunately the rotation causes the pattern to become stretched instead
>of being rotated.  Anyone know why and/or how to fix this?

You have to rotate around the z axis only.

(I suppose, theoretically, as a UV mapped texture you ought to rotate
around the W axis, but there isn't one.)

I used 


  uv_mapping
  
  texture {pigment {marble 
    scale 0.1 
    colour_map {[0.5 rgb 1][0.5 rgb x]}
    rotate z*90
  }}
  texture {pigment {marble
    scale 0.1 
    colour_map {[0.5 rgbt 1][0.5 rgb x]}
  }}



-- 
Mike Williams
Gentleman of Leisure

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