ArcadeAge  writes:   
      
   > While doing some research for this issue, I came upon a forum   
   > discussion where someone mentioned a program named "koala2ppm.c". I   
   > was unable to obtain such a file or program text. Does anyone reading   
   > this know anything about this?   
      
   Knowing history helps, Pbmplus and later Netpbm didn't usually name   
   converters with a "2" in the middle, they used "to". And what do you   
   know, Google coughs up https://github.com/nafmo/koalatoppm. Old code   
   from 21 years ago but seems fairly simple so should be compilable and   
   usable today.   
      
   Same guy has done an artstudiotoppm converter as well.   
      
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