Sascha Ledinsky <sas### [at] userssourceforgenet> wrote:
> > How do I select which diagonal to use when converting quads to 2
> > triangles? 

> It should not matter...

  Actually it matters when you use uv-mapping. This graphic illustrates
the problem in question:

http://www.cs.tut.fi/~warp/images/uvproblem.gif

  (Let's see who is the first to wrongly answer something related to
perspective... ;) )

-- 
#macro N(D)#if(D>99)cylinder{M()#local D=div(D,104);M().5,2pigment{rgb M()}}
N(D)#end#end#macro M()<mod(D,13)-6mod(div(D,13)8)-3,10>#end blob{
N(11117333955)N(4254934330)N(3900569407)N(7382340)N(3358)N(970)}//  - Warp -

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