Wasn't it Steely who wrote:
>Mike Williams <nospam [at] econymdemoncouk> wrote:
>
>> For a real blueprint, you probably don't want a wireframe of the whole
>> house, what you want is a slice through the house, like this:
>
>Don´t know if this would match in all and any cases, but more important: any
>workaround to overcome the object pattern limitation of "no texture, no
>patches" ?

It would certainly be easier to change the POV program to remove those
limitations than it would be to get it to produce wireframe renderings
of things like isosurfaces and blobs.

>If I have to construct two buildings, one with, one without textures and
>patches, I´ll better go on with my (ugly hand-drawn) sketches ;-)

Instead of the object pattern, you could difference the building with a
thin box. The textures from the original building would only appear on
the faces that are perpendicular to the camera, and therefore invisible.

 
difference {
  box {<-100,0.1,-100><100,0.1001,100>}
  object {House}
  pigment {rgb <0,0,1>}
  finish {ambient 1}
}

// white bits seen through the hole
plane {y,0 pigment {rgb 1} finish {ambient 1}}

-- 
Mike Williams
Gentleman of Leisure

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