since we are on the subject of bump, here is the bump example I got working
from
..... dangit cant locate original work or I would give credit here.

from fabric.pov


/*
A fabric bump map is used to shade the surface (see fabricbumps.pov)
Then, a checkerboard is overlayed using alternating patterns of H_streaks
and V_streaks. */


#declare fabric = texture {
  pigment { checker pigment { H_streaks } pigment { V_streaks } scale
0.5*0.17 }
  normal { bump_map { gif "fabricbumps.gif" bump_size 10 } scale 0.17 }
  finish { diffuse 0.8 specular 0.2 }
}

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