Have you looked at PDF at all? In th simpest case, just import the PDF writer and alter the initial size() command.

http://processing.org/reference/libraries/pdf/index.html

kb, http://www.riftgame.com/

Already tried that; it doesn't work. It does create Zero k PDF files that won't open, though. Maybe you should take a look at the actual code if you haven't already, and try it.

What method(s) have you tried to do this PDF? There are several possible.

I tried importing the processing pdf library and setting up a command to save the file to PDF, which doesn't work, maybe because the code uses PGraphics and/or a z-axis, which may not be supported for capturing to PDF.

I also tried a separate .pde file which invokes that library and some other code to capture to PDF, but it doesn't work, either. Since I didn't write the original code I want to modify, or the .pde file to capture to PDF, I really don't know exactly how it works, or how to modify it; I'm not a programmer.

I glanced at the code. That one actually is producing only raster data (pixels). Thats why you can't get a PDF out of it.

Well, it would be nice if it could be changed to produce vector data; it would also be great if PDF export was built into Processing by default so that anything could be exported to PDF. Maybe that's too much to hope for.