appearance {
    texture {
      file geologo.pgm.Z
    }
}
#
# homogeneous biquadratic Bezier patch for a hemisphere
#
CBEZ224_ST
 1  0  0  1	0  0  1  0	-1  0  0  1	
 0  1  0  0 	0  0  0  0 	0 -1  0  0	
-1  0  0  1	0  0  1  0	1  0  0  1	
0 0  1 0  0 1  1 1

# RGBA colors for each corner of the hemisphere patch
.3 1 .3 1			1 .3 .3 1
.3 .3 1 1			1 .3  1 1