In article <3ED### [at] hotpopcom>,
 Xilo Musimene <xil### [at] hotpopcom> wrote:

> Ok, I'll post what I mean in p.b.images as "Fill Height field"

I didn't say to scale the height field to overlap the box just to make 
it more challenging. The speckles should be a dead giveaway: you are 
seeing an equivalent to the coincident surface problem, sometimes the 
sides of the box are "inside" the height field, sometimes they are 
"outside", depending on how the precision errors turn out.

intersection {
    box { <-0.5, -0.5, -0.5>, <0.5, 1, 0.5>}
    height_field { png "Heightfield.png" smooth
        scale < 1.02, 0.1, 1.02>
        translate <-0.51, 0, -0.51>
    }
    pigment {rgb 1}
}


> // or perhaps: plane { <0,1,0>, 3 }

No, that will not work. You are adding sides, a plane doesn't have sides.

-- 
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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