Simon wrote:

> Hi,
> as you can see there are many black spots on the image below.
> I can't get rid of them and still get the result I want. Why are they there
> and how can I make them go away?
> 

I had a similar problem with a "smooth" heightfield a while back.  This 
is because, IIRC, some of the triangles' normal is pointing the wrong 
way.  Try "double_illuminate".


-- 
/*Francois Labreque*/#local a=x+y;#local b=x+a;#local c=a+b;#macro P(F//
/*    flabreque    */L)polygon{5,F,F+z,L+z,L,F pigment{rgb 9}}#end union
/*        @        */{P(0,a)P(a,b)P(b,c)P(2*a,2*b)P(2*b,b+c)P(b+c,<2,3>)
/*   videotron.ca  */}camera{location<6,1.25,-6>look_at a orthographic}

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