Quality difference between Windows and GNU/Linux versions

Technical support for the Linux and Mac platforms for all Trine games.
dario
Posts: 2
Joined: Sun Jun 10, 2012 12:51 pm

Quality difference between Windows and GNU/Linux versions

Postby dario » Sun Jun 10, 2012 1:17 pm

Noticed at first glance:

- graphics is much smoother in Windows version under Wine than in GNU/Linux version (antialiasing disabled in either case); picture A (http://bayimg.com/kaPdbAAdb) shows a frame from the former, picture B (http://bayimg.com/kaPDEAADB) demonstrates the latter.

- the Frozenbyte logo animation at the beginning of the game is blocky in the GNU/Linux version; a double compression in a lossy format seems responsible for the quality loss.

- the cutscenes are smoother in the Windows version (http://bayimg.com/jApdhaadb) than in the GNU/Linux port (http://bayimg.com/JAPDMaAdb).

It's frustrating to know that the native GNU/Linux port is plagued with these issues which would fade away when switching to Wine.

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fb_jpk
Posts: 140
Joined: Thu Jun 16, 2005 8:05 pm

Re: Quality difference between Windows and GNU/Linux version

Postby fb_jpk » Tue Jun 12, 2012 5:50 pm

As far as the video quality goes... I guess the difference could be due to double compression. I don't know if the source for the Trine Linux version videos was actually the compressed version or the raw uncompressed version. Of course, some of the difference could also be because of just using a totally different video compression and different encoding quality settings. But, I'm not really able to tell why, because I don't know the details. Its of course unfortunate that there are any quality differences. :?

As far as the other game screenshot images go.. At least some of that could be simply explained by different anisotropic settings... It looks a bit like there is just different mipmapping bias at work.. The smoother image is biasing the less accurate mipmap. One thing to try to "equalize" those, would be to tweak the game's anisotropic settings, and/or to tweak the settings from the graphics card control panel. Naturally, despite those settings, some differences might remain, given that one is running under Direct3D and the other under OpenGL. But it should be possible to get them look quite closely the same.

dario
Posts: 2
Joined: Sun Jun 10, 2012 12:51 pm

Re: Quality difference between Windows and GNU/Linux version

Postby dario » Wed Jun 13, 2012 1:51 pm

I am running the Windows version with Wine on the very same machine I run the GNU/Linux version. Wine translates Direct3D calls to OpenGL as well. I run the two versions with the same graphical settings, but even my little sister is able to tell the difference between the two. Anisotropic filtering is set to 8 for both. The Windows version delivers better quality even with anisotropic filtering disabled.


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