Am 31.08.2012 13:17, schrieb mathieu_r:
> Sorry, I come back..
>
> Actually, filling my object is easier than making it empty..
>
> To make it empty, I tried to clip my height_object with a sphere with a value of
> transmit equal to 1.

Why not simply use clipped_by for that purpose?

> But I can still see the sphere contours even if they're smoothened.

Try explicitly specifying the sphere's finish as "ambient 0 diffuse 0 
specular 0 phong 0 emission 0 reflection 0"; maybe some earlier 
"default" statement is setting one of these values to non-zero by default.

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