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You are free:

• to share – to copy, distribute and transmit the work
• to remix – to adapt the work

Under the following conditions:

• attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
• share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.

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#declare RAD = on;
#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 }

#declare corner = lathe { // a quarter of cyclindic volume used to "round" the corners
    linear_spline
    6
    <0,0>,<0.05,0>, <0.1,0.05>, <0.1,1.35>,<0.05,1.4>, <0,1.4>
    rotate 90*x 
}
 
#declare side =  prism { // the extrusions of the volume
  linear_sweep
  linear_spline
  0, 1, 9,
  <0.05,0>, <0,0.05>, <0,1.35>, <0.05,1.4>, <2.05,1.4>, <2.1,1.35>, <2.1,0.05>, <2.05,0>, <0.05,0>
}

#declare bottom = prism { // The bottom of the core
  linear_sweep
  linear_spline
  0, 1, 9,
  <0.05,0>, <0,0.05>, <0,1.35>, <0.05,1.4>, <0.35,1.4>, <0.4,1.35>, <0.4,0.05>, <0.35,0>, <0.05,0>
}

#declare middle =  cylinder { // the extrusion of the middle leg
  <0,0,0>,<0,1,0>,0.35
}

union {
  difference{
    union{
      object {side scale <1,1.5,1> translate -1.05*x  }
      object {bottom scale <1,1.9,1> rotate -90*z translate <-0.95,0.3,0> }
      object {corner translate -.95*x}
      object {corner translate 0.95*x} 
      rotate -90*x
    }
    union{
      cylinder{<0,0,0>,<0,10,0>,0.9}
      box{<-0.9,0,0>,<0.9,10,10>}
      rotate -90*x translate <0,1.05,-0.3>
    }
  }
  object {middle scale <1,1.5,1>  rotate -90*x translate <0,1.05,0>  }

  rotate <0, -20, 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 <0.27,0.3,0> angle 11}

And compiled using the following command:

povray -IEP_core.pov -W1280 -H960 -Q11 +A