Ive wrote:
> Jim Charter wrote:
> 
>> Okay :)
> 
> 
> I'm deeply impressed by your patience and modeling skills (and
> not to forget by those craftsmen who actually made this out of
> stone) but the texture does not work for me. I cannot sense
> what kind of material this is meant to be.
> 
> -Ive

I agree, it is really not what I want, and one might ask: why post it 
then?  And the answer is that I needed some way to break out of a 
Sysiphus-like cycle where I would get close then destroy what I had 
done, and so constantly reinventing, so I tried to consolidate what was 
at least close by forcing myself to post something.

Your specific confusion is justified.  It is caused because I tried to 
use a granite pattern to suggest the clotting of grime due to actual 
surface texture, but the result might just as easily suggest the actual 
colour patterning of granite itself.  That problem is acerbated by a bug 
on this render whereby the normal perturbation does not correspond to 
the grunge pattern like it was supposed to.*  I now have a render where 
that is fixed, but I have a bunch of other ideas I want to try before I 
post again.

*I fixed the bug without understanding why.  I might also try to isolate 
the behavior and see what you all can make of it.  It involved the slope 
pattern not working as expected for the y direction when converted to a 
function.

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