>
> Oh - you seem to think the lead is a textural device - while I never thought
> of that - although NOW it seems obvious. The lead is another cylinder
> entirely.

I thought that it was. What I was thinking was that instead of using just the
graphite pigment for the lead that you combine it with whatever wood texture
(and parameters ) that was used for the pencil in the texture for the cylinder.
I slapped together a real basic image, hope you don't mind.   ;-]

KB-

cone { <-1, 0.001, -1>, 0.001, <2, 4, 2>, 1.2
texture {
planar
turbulence 0.4
texture_map {
 [0.01 T_Wood23 finish { ambient 0.3 } scale 4 rotate z*-40 ]//whatever Wood
texture you choose
 [0.2 pigment { rgb 0.65 } finish {specular 0.5 roughness 0.15 }]
 }
translate y*0.6
}
}

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