Hello

I use this code to produce the body of a rocket :

#declare forme = sor { 16,
                       <0.0005,-6>,
                       <1.0,-4>,
                       <1.01,-2>,
                       <1.15,0>,
                       <1.35,2>,
                       <1.55,4>,
                       <1.69,6>,
                       <1.8,8>,
                       <1.89,10>,
                       <1.925,12>,
                       <1.79,14>,
                       <1.5,16>,
                       <0.99,18>,
                       <0.175,20>,
                       <0.07,20.1>
                       <0.0005,23>
                       hollow
                     }
later restricted to the sections of interest by various "difference" with
co-axial cylinders in CSG operations, but this makes no ... difference.

When textured with :

#declare txtr = texture { pigment { color Red }
                         finish { ambient 0.05 diffuse 0.8 }
                        }

I get strange results, with the object beeing usually OK, but, for some
orientations and distances to the observer, full of "semi-random" holes
(perpendicular to the axis of the SOR), shape errors, and granite-like black
imperfections.

Which parameter is wrong ?
I set :
global_settings { max_trace_level 256 assumed_gamma 1.0 }

Thanks !
Gilles

Post a reply to this message