Kirk Andrews wrote:
> I'm working on a scene of some ancient Greece-style ruins.  It has proved to
> be very difficult to get everything to look sufficiently weathered and
> "ruined".  But here is one of the columns as it stands at the moment.  If
> anyone has experience or suggestions in ruining things in POV, I'd love to
> hear them.
> 
> - Kirk
> 
> 
> ------------------------------------------------------------------------
> 
I don't have anything brilliant to add nor can I provide a magic bullet. 
But you've made a beautiful graceful column so far with some nice 
texturing.  As others have said, most find that they reach a point of 
diminishing returns when trying to simulate distress by differencing out 
from primitives with primitives, and integrating those effects with 
perturbed normals,... though there seems no reason that it can't be done 
if sufficient patience and ingenuity is applied to the task. So most 
turn to isosurfaces for real displacement effects from procedural 
patterns.  When render times get large the next recourse is 
programmatically generating meshes where again procedural patterns can 
be incorporated to displace the surface.  Such an approach for 
brickshapes is a macro recently published by Bill Pragnell.  This could 
be adapted for cylinders too.   There are also some heightfield macros 
that might also be useful.

Your textures are quite beautiful, the next stage would be to make the 
coloring also responsive to the surface so that grime seems to reside in 
the recesses and so on.  Remember that a factor in the weathering of 
building is the role of bird poop and the like.  Recesses get perched 
on, biology takes its course, then rain causes grime to run and leech 
down the surface.

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