Small problem that I come across, perhaps it's worth mentioning in docs?


// by Rafal Maj 'Raf256', Copyrighted (C) 2003 http://www.raf256.com/pov/
// from p00282 "arom gamma logo" atom_logo_gamma
// shows a possible problem of MegaPov 1.1 in MotionBlur
// http://megapov.inetart.net/manual-1.1/megapov011.html#enable                       
         
#version unofficial megapov 1.1; 

global_settings {
   adc_bailout 1/600 // <-- needed !
// adc_bailout 1/256 // leaving this deffault will lead to a problem.
  motion_blur 400, 1/24
}
background { rgb z*.4 }
camera { location -z*10 }
motion_blur { type 1
  sphere { z, 1 rotate y*clock*4000 
    pigment { rgb 1 } finish { ambient 1 } 
  }
}  


I would add to docs:

2.5.2. Motion blur

[...]
SAMPLES is the number of time-frames that will be sampled. More samples 
will give smoother results, but will take longer to render.

+++ Reasonable values for most purposes are usually 20..100. When using 
very high quality, especially with samples > 256 please remember to adjust 
adc_bailout as well (set it to 1/300 or lower). In other case each copy of 
blurred object will be too transparent to be noticed, and will be rendered 
as a black spot.


-- 
http://www.raf256.com/3d/
Rafal Maj 'Raf256', home page - http://www.raf256.com/me/
Computer Graphics

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