Greetings,

I've been making an object library which allows me to make beveled, 
filleted and chamfered objects, to be used for stone pillars and the 
like. Not wanting to deal with slow csg operations, I opted to make 
everything from basic shapes with the clipped_by modifier applied.

It all works very well, since the (hollow) surfaces meet up with each 
other if used properly. To see how well, I tested the closed objects 
with interior_texture, transparency, media, refraction, and interior 
attenuation. All these features work as they should, and the render time 
is relatively fast, as expected.

The problems come when I try to apply traditional csg techniques to my 
objects (difference, merge, intersection). Strange artifacts appear, 
such as transparent planes, partial csg results, and other strange things.

I'd rather not post my code here, as the definition for each object is 
rather large.

Has anyone else encountered strange results when trying to difference, 
intersect or merge unions of clipped_by objects? Was there a workaround? 
I'm beginning to think there isn't a solution....

Sam

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