More fiddling with Color Print Shop...using a rainbow background.

I was integerizing the coordinates, and that wasn't quite right.

It looks more like dot matrix output now:

[Linked Image from i.imgur.com]
[Linked Image from i.imgur.com]

but the file size is huge: 515MB

515665131 Oct 9 18:41 test94.pdf

No wonder it takes a minute to render it.