Following scene produces an incorrect rendering with povray 3.1 (the linux 
and windows version, as well as megapov). The 'f' and 't' of the pigment 
are ignored in the shadow calculation; when the triangle is not inside a 
mesh{}, then everything is correct.

Code follows.

- Micha Riser

// begin code

camera{
         location <0,4,-4>
         look_at <0,1,0>
}

light_source{<-10,50,0>  color 1 }

#declare TT=texture{pigment{rgbf <1,.5,.5,0.7>}} //or 'rgbt'

mesh{
         triangle{ <-1,1,-1>,<1,2,0>,<0,1.5,1> texture{TT} }
}

plane{y,0 pigment{rgb 1} }

// end code

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