28 Jan
2026
28 Jan
'26
12:58 p.m.
Possibly related to the jpg support on Windows, I discovered in the last week that when using a jpg as a bitmap overlay for a surface mesh in Therion to build a LOX file, the jpg is not rendered in the Loch viewer if it was saved with the progressive encoding option checked in Gimp. Footleg On Tue, Jan 27, 2026 at 8:20 PM <mike@mikemccombe.co.uk> wrote: > I think I had the same problem a month or two ago using Therion on > Windows. My solution was to load my jpeg into gimp and then export it with > all of optional jpeg coding extensions turned off - so I had what you might > call a "20 century jpeg". Therion on Windows was happy with this. > > Mike McCombe > > > -----Original Message----- > > From: Therion <therion-bounces@speleo.sk> On Behalf Of Bill Gee > > Sent: 27 January 2026 19:07 > > To: Therion Mail List <therion@speleo.sk> > > Subject: Re: [Therion] xTherion will not open JPG backgrounds > > > > Update - Argh!! This is frustrating. It is sort of like the Linux > version of DLL > > Hell. > > > > Apparently when I did the system updates a few weeks ago, the tkimg > package > > removed itself from tcl 8.6 and added itself to tcl 9.0. I searched > through some > > old emails (lucky I still have them!) and found a thread from August > 2025. The > > solution in that thread was to modify the xtherion program so it > executed in > > wish8.6 instead of wish 9. > > > > Repeating my tests from then - I found that package Img is no longer > available > > in tcl 8.6. I changed xtherion to call wish 9.0, and now it works. JPG > > backgrounds will now load. > > > > The solution in August was to switch to TCL 8.6. The solution this > > month is to switch to TCL 9.0. Sheesh ... > > > > bgee@main2:~$ tclsh8.6 > > % package require Img > > can't find package Img > > % exit > > bgee@main2:~$ tclsh9.0 > > % package require Img > > 2.1.0 > > % exit > > bgee@main2:~$ > > > > > > =============== > > Bill Gee > > > > On 1/27/26 12:41, Bill Gee wrote: > > > Dang it ... I remember seeing this problem some months ago, probably > > > in June, but now cannot remember how I fixed it. > > > > > > Therion 6.3.4+dev running on Fedora 43. > > > > > > In late December I worked on a cave map and had no problems with it. > > > xTherion opened jpg files as backgrounds. Today I went back to that > > > same map, and it will not load the background jpg files. It will open > > > png backgrounds. The only error I can see is in the Background Images > > > field. It shows the name of the jpg file and adds "(unknown)" at the > end. > > > > > > I checked both tkimg and libjpeg. They are installed. What else is > > > required for this to work? > > > > > > I started xtherion from a command shell. There were no additional > > > error messages. Is there a log file somewhere that might give more > clues? > > > > > > In early January I ran the usual update process for all packages. > > > Both tkimg and libjpeg were updated. I don't see anything that was > > > removed other than old kernels. > > > > > > Thanks! > > > > > > > _______________________________________________ > > Therion mailing list > > Therion@speleo.sk > > https://mailman.speleo.sk/listinfo/therion > > _______________________________________________ > Therion mailing list > Therion@speleo.sk > https://mailman.speleo.sk/listinfo/therion >