It sounds like a problem with the mesh parsing code, not with the 
HF_Square() macro. It may be that the macro is outputting bad meshes for 
some reason and that the parse code is crashing instead of reporting an 
error. I didn't do any work on the mesh2 versions of the macros, but 
they seem to work fine in other cases. On the other hand, so does the 
mesh2 code...

-- 
Christopher James Huff <cja### [at] earthlinknet>
http://home.earthlink.net/~cjameshuff/
POV-Ray TAG: chr### [at] tagpovrayorg
http://tag.povray.org/

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