Hello,

I know there are problems with smooth HF's but now I see troubles with non
smooth HF's too. I haven't found anyone mention it before, though it's
probably a known problem because double_illuminate helps - though doesn't
solve the problem.. The problem arise when a texture has normals:


camera { location -6*z look_at 0 }
light_source { <30,30,-30>,1 }

height_field { function 100,100 { pigment { granite } }

 pigment { rgb 1 }
 normal { bumps .5 } // Normals activate problem

 translate -.5
 scale <5, 0.2, 5> rotate -90*x
}


Regards,
Hugo

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