makepref - the program used to create lib/user/graf-ibm.prf
It was written by Mike Marcelais, IIRC, author of the Druid Moria variant.

Almost pointless -- or someone else would have done it earlier --
modification for 2.9.1 with or without JLEdit by pelpel:
 - to understand 2.9.1 data structures;
 - to output correct S: lines for flavoured items; and
 - to support treasure chest mimics (found in JLEdit patch).

That being said, it might be interesting to create an X font out of
angband.fnt (that shouldn't be hard) and use an output of this file as
font-x11.prf.

So...

I made a BDF file. I took liberty of mixing symbols from the orignal
with those from angband.fnt in a PernAngband package, adding a couple of
my own, rearrenging 0x80--0xFF, but leaving monsters ASCII (graphical
monsters, be they fonts or tiles, are too hard for me to tell one from
another). The same changes are reflected in angband.fnt in this archive.

Install this into one of your X font directory (ask X guru how to do that
--you can put it under your home directory if you haven't got root permission--
and set environment variable ANGBAND_X11_FONT_0 to
	-angband-fixed-medium-r-normal--16-120-100-100-c-80-misc-fontspecific
or, if you are using XAW, put the following line in your ~/.Xdefaults
Angband.angband*font: -angband-fixed-medium-r-normal--16-120-100-100-c-80-misc-fontspecific
You have to run xrdb in this case to make the change take effect.

Then run "makepref font-x11.prf" to create prf file (make a backup of
font-x11.prf before you do that!! It's very likely that you repent and
go back to good old ASCII).

Some variants are very straighforward to deal with, some are terribly hard.
I find modifying the program for PernAngband is nearly impossible, for
example. You still can interact with visuals, but since there are way to many
tarrain features, monsters and items in Pern, I attached an incomplete prf
file for that.

- pelpel