[romandesign]

I've extended myself to you if you find it too complicated but if it's a matter of time or you find it too cumbersome, I'm not your guy. 

Thanks a lot for your help, it did clarify things for me. In the end I've fixed the aspect ratio issue by editing MKV header files. So it looks like the full resolution is played now. However I don't see any difference in the final appearance, and no difference between quality in half-resolution or full resolution TAB files. PowerDVD has the same quality, but somehow less 3D depth effect. but as I don't see more detail and still see same moire and slight jagginess, I now suspect that they are due to the Nvidia 3D checkmark enabled. As soon as I turn it off - all fonts and lines become ugly, I'm not sure if resolution is lost or anything else is happening, but everything just looks bad. Not blurred, but a bit chaotic in lines and shapes, as though it's upscaled and downscaled badly or something like that. Is resolution lost this way? Not sure, all pixels are there but they are arranges in a weird way. It's hard to describe when you're not seeing it. It may be related to what I perceive a s resolution loss. Nvidia is not supposed to lose resolution, but when I enable same checkmark on my other computer with older Nvidia card and 120Hz 3D Vision monitor - everything stays the same, no ugly fonts etc. But when I enable 1080p24 3D in my GTPC with 1050ti - I get this ugliness on the projector. IT may be the Nvidia card or the projector that's doing it, not sure...