Hi,
I just looked at the screenshots of Jedi Knight and I have to confess, I'm disappointed: Am I right to guess that the graphics are only software-mode? I hoped it would be possible to enable D3D, especially because the 16-bit-dithering-issues older games tend to have on modern hardware are much more visible in software mode...

From the GOG gamepage it states:

Windows 8 compatibility notice: Hardware mode is not supported.


Now to me that suggests that hardware mode may work on XP, Vista and 7. But do no rely on it working on Win8.
That said, I'm sure various people here in the forums will be looking for ways to emulate hardware mode, such as via D3D hooks or nglide or similar.

Well, I don't have the GoG version. But I can say I got it running in win8/hardware mode via a fix-I-cant-remember-where-I-got-it. But the experience wasn't very good, wonky mouse movement and odd resolution/fov

Yes, I'm sure there will be workarounds. But it would be great if GOG offered two modes for the game - the always working software mode and D3D for those who are lucky. Shouldn't be a big problem in my opinion.

So, how its adapted for modern systems? Better than Steam version?

3d accelerator is available in graphic options (I have win7 and works fine)

you have to disable the reverse in all axis for the mouse controls. that will fix it (and enable crosshair).

Ok, I couldn't resist the temptation and had to buy it on risk. ;)
The good news: D3D mode works perfectly on my Vista 64-system. The soundtrack plays too (I've heard that was one major problem with the Steam-version).
The only problem (not GOG's fault) I see are the visible borders in texture-transitions, especially in dark places - the mentioned dithering-problem (the game uses 8bit). It's a shame, but the former graphical glory of these games seems to be lost forever. :(

I have this game on Steam and it works fine with 3D enabled. There are also some nice high definition texture mods mods on JKHub. Music fix can also be found here: http://steamcommunity.com/app/32380/discussions/0/540740501398048712/

I don't know about GOG version, but Steam version also comes with a modern control scheme preset (WASD).

I've had a flawless experience with the game. In case you get CTD with 3D acceleration enabled, just force vertical sync and triple buffering in your graphics card control panel.

Try this as well: http://steamcommunity.com/app/32380/discussions/0/619574421426511905/

This is the same procedure I went through to get the game working.

Does this version still have the redbook audio? I know some GOG releases have found some kind of workaround for games that previously had redbook audio on the CD, and the Steam version was an absolute clusterfuck...

I'm on Windows 7 and the game works great with 3D acceleration, cool controls (if you change a bit the default settings, like invert mouse and stuff, as already mentioned above) and especially the music works, which was the main problem on the Steam version (haven't tried the patch, it wasn't available at the time).

Being able to play the game in good conditions without getting bored with patches and all is definitely worth 4 euros. Thanks gog! :)

I don't know if it comes with the GOG version, but the steam version had a "modern" config you could load in the options menu that would bind all the controls to those similar to modern games, like 'E' being use and that, and fixed mouse look.

Does this version also have that weird 30fps cap on the camera movement?

Doesn't seem to be any modern config, but the default one is not that far. You move with ZQSD (or WASD for you weird qwerty people), run with left shift... The 2 main things to change are the Jump (on right mouse by default) and the Use (on Space).

Hardware mode on my AMD R270x makes my PC go completely crazy with flickering and flashing, even when the game is closed and requires a reboot to clear up. I suspect it'll work on my nVidia rig, honestly i'm surprised they got hardware mode working period. Direct X 7 era games are a major bitch.

Edit:

I fixed this problem on my AMD rig by setting "Disable Desktop Composition" in the compatability tab of the shortcut if anyone else runs into this problem.