Dave VanHorn wrote:
>> #declare N_WoodGrain12a = normal {
>>     bozo
>>     turbulence 0.04
>>     lambda 2.5
>>     omega 0.1
>>     octaves 7
>>     scale <0.5, 0.05, 0.05>
>> };
> 
> Ok, but how did you arrive at that?
> I looked through the docs on normal, but didn't see any way to apply the pigment
> or texture as a normal.

Other than experience and a lot of RTFM, you should read more closely 
and realize there's no such a thing as "any way to apply the pigment or 
texture as a normal", I think you got that wrong.

A normal features a pattern, just like a pigment.  In fact, you can use 
pretty much the same pattern and options for one and the other, the only 
main differences are that pigment can have color_map and normal, a 
bump_size property.

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