Sascha Bohnenkamp wrote:
> 
> ... get the old samples (POV 3.0) rendered with POV 3.1?

  Some of them just wont work in 3.1 due to changes in the code.
Halos and atmosphere for example are now obsolete and there is no
backward compatability. In other cases you need to add some syntax
changes to get them to work or try using the version directive.

One of the major syntax changes was the addition of the simi-colon
for declared parameters e.g. 

#declare Red = rgb <1,0,0>;
#declare CC  = 1.1075;

The use of ior has been moved from the finish statement into a
new statement called "interior" so for glass objects your code
would now look something like:

sphere { <0,0,0>,1
 pigment { rgbf<1,1,1,1> }
  interior { ior 1.37 }
   finish { "finish stuff here" }
}

The word refraction has been discontinued.

  Hope this helps and good luck.

-- 
Ken Tyler

tyl### [at] pacbellnet

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