File:Toroid core.png

Aquired from: http://commons.wikimedia.org/wiki/Image:Toroid_core.png

Licensing
Made using povray 3.6, with the following source:
 * 1) declare RAD = on ;
 * 2) include "colors.inc"

global_settings { #if(RAD) radiosity { brightness 0.60 count 100 error_bound 0.2 gray_threshold 0.0 low_error_factor 0.2 minimum_reuse 0.015 nearest_count 10 recursion_limit 1 #if (version>3.1) adc_bailout 0.01 max_sample -1.0 media off normal off always_sample 1 pretrace_start 0.08 pretrace_end 0.01 #end } #end }

background { color White }

lathe { bezier_spline 32 <1.2,0>,<1.3,0>,<1.7,0>,<1.8,0>,  <1.8,0>,<1.9,0>,<2,0.1>,<2,0.2>,  <2,0.2>,<2,0.3>,<2,1.2>,<2,1.3>,  <2,1.3>,<2,1.4>,<1.9,1.5>,<1.8,1.5>,  <1.8,1.5>,<1.9,1.5>,<1.3,1.5>,<1.2,1.5>,  <1.2,1.5>,<1.1,1.5>,<1,1.4>,<1,1.3>,  <1,1.3>,<1,1.2>,<1,0.3>,<1,0.2>,  <1,0.2>,<1,0.1>,<1.1,0>,<1.2,0>  rotate <-10,0, 0> finish { #if(RAD) ambient 0 diffuse 0.7 #else ambient 0.2 diffuse 0.5 #end phong 1 phong_size 60 }  pigment { Gray } } light_source { <2, 4, -3> color White} camera {location <1,8,-15> look_at <0,0.55,0> angle 16 }