Am 21.10.2011 16:40, schrieb cartun:

> My Version is:  Version 3.6.1 (Debian  (x86_64-linux-gnu-g+
> + 4.4.5 @ x86_64-pc-linux-gnu))

You can't use both focal blur and anti-aliasing at the same time with 
version 3.6.1; with focal blur activated, that version of POV-Ray will 
automatically ignore any anti-aliasing settings, and rely solely on 
focal blur to do that job.

I suggest using the latest 3.7.0 release candidate; it has some 
improvements to focal blur (including, but not limited to, the ability 
to use anti-aliasing at the same time), which might already help with 
your spotty artifacts.

> The Shadows from the boxes.. :
>
> http://s1.directupload.net/file/d/2684/b6n884qk_png.htm

The "cut-outs" at the near corner of the shadows indicate that "adaptive 
0" isn't enough, and you should use "adaptive 1" instead.

As for the graininess: You can probably improve that by using a higher 
resolution of the area light, e.g. "9,9" instead of "5,5"; using even 
more aggressive anti-aliasing might help as well.


I also notice that your area light is not square; is that intentional, 
or did you mean to use "area_light <0,0,3> <3,0,0>"?

(You might also want to try "circular orient", unless you're 
specifically aiming for a square light source.)

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