I've found examples, and made my own, of using stippled lines and outlines, but the knowledge does not seem to transfer to doing stippled fills.

Since posting, I turned up this quote from the 300 and something google hit on my fourth set of search criteria:

======================================================================
+==

#12.4. How can I get bitmaps created with 'image' to work with
'-stipple'?

At the moment, you can't.  Bitmaps created with 'image create bitmap
...' do not use 'Tk_DefineBitmap', which is required for '-stipple' to
know it's a bitmap.  Instead, you'll have to use the old format for
using bitmaps in stipples, like so:

.canvas create rect 10 10 80 80 -fill black -stipple @/path/to/my.bmp

It's not a simple C fix for the above problem, but it's on Sun's ToDo
list.
[download]

Whether that is relevant, still current, whatever, I have no idea.

I also previously went through my copy of Perl/Tk (on CD) looking for a worked example, but there either isn't one in there or I managed to miss it?

I've tried using both the built-in stipples (gray50, gray25) etc. and bitmaps I've created myself using DefineBitmap(). Once I got the incatations right, I ceased getting errors, but it simply has no effect on the graphic? Hence, asking if there was an example out there. Three solid hours of Googling hasn't turned up a single piece of code that does a stippled fill.