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diff --git a/render_povray/templates_pov/diffract.pov b/render_povray/templates_pov/diffract.pov
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+// This work is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License.
+// To view a copy of this license, visit http://creativecommons.org/licenses/by-sa/3.0/ or send a
+// letter to Creative Commons, 444 Castro Street, Suite 900, Mountain View, California, 94041, USA.
+
+// Persistence Of Vision raytracer sample file.
+//
+// -w320 -h240
+// -w800 -h600 +a0.3
+
+#version 3.6;
+global_settings{ assumed_gamma 1.0 max_trace_level 5 }
+
+#include "colors.inc"
+#include "woods.inc"
+
+
+#declare IOR = 1.45;
+#declare Fade_Distance = 2;
+#declare Fade_Power = 3;
+
+#declare Texture01 = texture {
+   pigment {
+     color rgbf <1, 1, 1, 1>
+   }
+   finish {
+      diffuse 0.000001
+      metallic on
+      ambient 0
+      reflection 0.05
+      specular 1
+      roughness 0.001
+      irid {
+         0.65             // contribution to overall color
+         thickness 0.8    // affects frequency, or "busy-ness"
+         turbulence 0.1   // Variance in film thickness
+      }
+   }
+}
+
+#declare Interior01 =
+   interior {
+      fade_distance Fade_Distance
+      fade_power Fade_Power
+      ior IOR
+      caustics 1.0
+   }
+
+
+#declare Texture02a = texture {
+    T_Wood1
+    scale 2
+    rotate x*90
+    translate x*5
+    finish {
+        ambient 0.4
+    }
+}
+#declare Texture02 = texture {
+   pigment {
+     color rgb<0.800, 0.800, 0.800>
+   }
+   finish {
+     brilliance 0.5
+     metallic on
+     diffuse 0.200
+     ambient 0.000
+     specular 0.300
+     roughness 0.02
+   }
+
+}
+
+#declare Texture03 = texture { Texture01 }
+
+//----------------------------------------------------------------------
+// This scene uses a non-standard camera set-up. 
+// (See CAMERA in the included documentation for details.) 
+// If you are new to POV-Ray, you might want to try a different demo scene.
+//----------------------------------------------------------------------
+camera {  //  Camera StdCam
+  angle 45
+  location  <3.50, -15.00, 3.00>
+  direction <0.0,     0.0,  1.6542>
+  sky       <0.0,     0.0,  1.0>  // Use right handed-system!
+  up        <0.0,     0.0,  1.0>  // Where Z is up
+  right x*image_width/image_height // keep propotions with any aspect ratio
+  look_at   <0.000, 0.000, -2.7500>
+}
+
+#declare Intensity = 20;
+#declare L_Fade_Distance = 20;
+#declare L_Fade_Power = 2;
+#declare ALL = 8;
+#declare ALW = 8;
+#declare ALR = 6;
+
+#declare Area_Light=off;
+
+light_source {   // Light1
+  <-0.2, 100, 65>
+  color Cyan * Intensity
+#if(Area_Light)
+  area_light x*ALL, z*ALW, ALR, ALR
+  adaptive 1
+  jitter
+#end
+  fade_distance L_Fade_Distance
+  fade_power L_Fade_Power
+}
+
+light_source {   // Light1
+  <0,  95, 65>
+  color Yellow * Intensity
+#if(Area_Light)
+  area_light x*ALL, z*ALW, ALR, ALR
+  adaptive 1
+  jitter
+#end
+  fade_distance L_Fade_Distance
+  fade_power L_Fade_Power
+}
+
+light_source {   // Light1
+  <0.2,  90, 65>
+  color Magenta * Intensity
+#if(Area_Light)
+  area_light x*ALL, z*ALW, ALR, ALR
+  adaptive 1
+#end
+  jitter
+  fade_distance L_Fade_Distance
+  fade_power L_Fade_Power
+}
+
+sky_sphere {
+    pigment {
+        gradient y
+        color_map {
+           [0.0 color Gray10]
+           [1.0 color Gray30]
+        }
+    }
+}
+
+union {
+  cylinder {   <-3,0,0>, <3,0,0>, 0.3 }
+  torus { 1.0, 0.25
+    rotate z*90
+    }
+  texture {Texture01}
+  interior {Interior01}
+  translate  <0.0, -4.0, -0.5>
+}
+
+box { <-1, -1, -1>, <1, 1, 1>
+  texture {Texture01}
+  interior {Interior01}
+
+  scale <3.0, 0.5, 0.5>
+  translate  -1.75*z
+  rotate x*45
+  translate  -1.5*y
+}
+
+sphere { <0,0,0>,1
+  texture {Texture03}
+  interior {Interior01}
+  translate <3, 3, -1>
+}
+sphere { <0,0,0>,1
+  texture {Texture03}
+  interior {Interior01}
+
+  translate  <0,3.0, -0.5>
+}
+sphere { <0,0,0>,1
+  texture {Texture03}
+  interior {Interior01}
+  translate  <-3.0, 3.0, -1>
+}
+cone { 0, 1, -2*z, 0
+  texture {Texture03}
+  interior {Interior01}
+  translate  <-4.0, 0.3, 0>
+}
+cone { 0, 1, -2*z, 0
+  texture {Texture03}
+  interior {Interior01}
+  translate  <4.0, 0.3, 0>
+}
+
+plane { z, -2
+    hollow on
+    pigment { Gray60 }
+}