>
> > The usual way is to use an image map.  As long as the resolution of the
> > image map is higher than the resolution at which your image is rendered,
> > it'll look fine.
>
> There is little relation between useable image_map resolutions and the
> render size, perspective and scaling could let you get away with very
> low-res maps or require much higher resolution.
>

A guesstimate at best. However, I read on dvgarage.com somewhere that an image
resolution of 1.5 to 2 times the size of the area occupied within the final
render.

--
light_source{0,1}#macro c(J,a)sphere{0,1pigment{rgb z}scale a translate J+O}
#end#macro B(R,V,O)c(0,4)intersection{c(V,R)difference{c(-z*4x+10)c(-z*4.1x+
10)c(0<7.5,45,5>)}}#end B(12,0z*25)B(8y*4<0,12,50>)          // Batronyx ^"^

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