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Here is my file and output; the only difference between the two sessions is the
sphere radius - 1357 units makes finite objects that render fast, 1358 units
makes infinite objects that render much slower, and also where there are no
objects.
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1) The POV file:
--
// Persistence of Vision Ray Tracer Scene Description File
// Vers: 3.6
// Date: 2008.07.05
#version 3.6;
global_settings { assumed_gamma 1.8 }
camera {
location <0, 5000, -10000>
direction 1.5 * z
right x * image_width/image_height
look_at <0, 1000, 0>
}
sky_sphere {
pigment {
gradient y
color_map {
[0.0 rgb <0.6,0.7,1.0>]
[0.7 rgb <0.0,0.1,0.8>]
}
}
}
light_source {
<-30000, 30000, -30000>
color rgb <1, 1, 1>
}
light_source {
<30000, 20000, -30000>
color rgb <1, 1, 1> * 0.4
}
#local Green = texture {
pigment { color rgb <0.6, 0.7, 0.4> }
finish { ambient 0 diffuse 1 specular 0.1 roughness 0.5 }
}
#local Blue = texture {
pigment { color rgb <0.0, 0.5, 1.0> }
finish { ambient 0 diffuse 1 specular 0.1 roughness 0.5 }
}
plane { y, 0 texture { Green } }
#local theSphere = sphere { <0, 1400, 0>, 1358 } // 1357 does not make infinite
sphere
union {
#local AZ = 25;
#while (AZ > 0)
#local AX = 25;
#while (AX > 0)
object { theSphere translate <AX * 2.0, 0, AZ * 2.0> }
#local AX = AX - 1;
#end
#local AZ = AZ - 1;
#end
texture { Blue }
}
--
The results in the message window:
A) Start with value 1357 for sphere radius:
--
POV-Ray 3.6 for Mac OS Frontend Build 197
Persistence of Vision(tm) Ray Tracer Version 3.6.1 for G4 (Mac CodeWarrior)
This is an official version prepared by the POV-Ray Team. See the
documentation on how to contact the authors or visit us on the
internet at http://www.povray.org/.
POV-Ray is based on DKBTrace 2.12 by David K. Buck & Aaron A. Collins
Copyright 1991-2003 Persistence of Vision Team
Copyright 2003-2004 Persistence of Vision Raytracer Pty. Ltd.
Parsing Options
Input file: Harddisk ... (edited) ... sphere.pov (compatible to version 3.60)
Remove bounds........On Split unions.........On
Library paths:
Harddisk:Applications:POV-Ray 3.6:include:
Harddisk:Library:Fonts:
Harddisk:System:Library:Fonts:
Output Options
Image resolution 320 by 240 (rows 0 to 240, columns 0 to 320).
Output file: sphere.pict, 24 bpp (system format)
Graphic display.....On (gamma: 1.8)
Mosaic preview.......Off
CPU usage histogram.Off
Continued trace......Off
Tracing Options
Quality: 9
Bounding boxes......On Bounding threshold: 1
Light Buffer.........On Vista Buffer.........On Draw Vista Buffer....Off
Antialiasing........Off
Radiosity............Off
Animation Options
Clock value.... 0.000 (Animation off)
Scene Statistics
Finite objects: 625
Infinite objects: 1
Light sources: 2
Total: 628
Preview may be significantly reducing the renderer performance for this scene.
You should consider turning (mosaic) preview off.
Render Statistics
Image Resolution 320 x 240
----------------------------------------------------------------------------
Pixels: 76800 Samples: 76800 Smpls/Pxl: 1.00
Rays: 76800 Saved: 0 Max Level: 1/5
----------------------------------------------------------------------------
Ray->Shape Intersection Tests Succeeded Percentage
----------------------------------------------------------------------------
Plane 223343 76800 34.39
Sphere 20199127 4031031 19.96
Bounding Box 24984246 20303964 81.27
Light Buffer 17462472 16939358 97.00
Vista Buffer 8922975 8723749 97.77
----------------------------------------------------------------------------
Calls to Noise: 0 Calls to DNoise: 10
----------------------------------------------------------------------------
Shadow Ray Tests: 232906 Succeeded: 5724
----------------------------------------------------------------------------
Smallest Alloc: 19 bytes
Largest Alloc: 38416 bytes
Peak memory used: 623373 bytes
Total Scene Processing Times
Parse Time: 0 hours 0 minutes 0 seconds (0 seconds)
Photon Time: 0 hours 0 minutes 0 seconds (0 seconds)
Render Time: 0 hours 0 minutes 51 seconds (51 seconds)
Total Time: 0 hours 0 minutes 51 seconds (51 seconds)
--
B) Sphere radius = 1358:
--
Parsing Options
Input file: Harddisk ... (edited) ... sphere.pov (compatible to version 3.60)
Remove bounds........On Split unions.........On
Library paths:
Harddisk:Applications:POV-Ray 3.6:include:
Harddisk:Library:Fonts:
Harddisk:System:Library:Fonts:
Output Options
Image resolution 320 by 240 (rows 0 to 240, columns 0 to 320).
Output file: eng.pict, 24 bpp (system format)
Graphic display.....On (gamma: 1.8)
Mosaic preview.......Off
CPU usage histogram.Off
Continued trace......Off
Tracing Options
Quality: 9
Bounding boxes......On Bounding threshold: 1
Light Buffer.........On Vista Buffer.........On Draw Vista Buffer....Off
Antialiasing........Off
Radiosity............Off
Animation Options
Clock value.... 0.000 (Animation off)
Scene Statistics
Finite objects: 0
Infinite objects: 626
Light sources: 2
Total: 628
Preview may be significantly reducing the renderer performance for this scene.
You should consider turning (mosaic) preview off.
Render Statistics
Image Resolution 320 x 240
----------------------------------------------------------------------------
Pixels: 76800 Samples: 76800 Smpls/Pxl: 1.00
Rays: 76800 Saved: 0 Max Level: 1/5
----------------------------------------------------------------------------
Ray->Shape Intersection Tests Succeeded Percentage
----------------------------------------------------------------------------
Plane 223330 76800 34.39
Sphere 139667610 4227743 3.03
Light Buffer 91874310 91874310 100.00
Vista Buffer 48454320 48454320 100.00
----------------------------------------------------------------------------
Calls to Noise: 0 Calls to DNoise: 10
----------------------------------------------------------------------------
Shadow Ray Tests: 232890 Succeeded: 5732
----------------------------------------------------------------------------
Smallest Alloc: 19 bytes
Largest Alloc: 38416 bytes
Peak memory used: 624401 bytes
Total Scene Processing Times
Parse Time: 0 hours 0 minutes 0 seconds (0 seconds)
Photon Time: 0 hours 0 minutes 0 seconds (0 seconds)
Render Time: 0 hours 3 minutes 20 seconds (200 seconds)
Total Time: 0 hours 3 minutes 20 seconds (200 seconds)
--
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