3D is not currently supported under the GBM/V4L2 video pipeliine and adding support is not a high priority for the Pi Foundation devs. I've been told that adding TAB/SBS support in the future should be possible, but MVC requires more complex changes and MVC ISO support is unlikely to ever be added back to RPi4 (and RPi2/3 once they bump to GBM/V4L2). In the last 8-years of running distros on Pi boards some lessons have been learned and this time around we all (LE, Kodi and Pi Foundation devs) aren't interested in authoring and then maintaining 100,000 lines of code patches that can never be upstreamed to the respective projects 3D depends upon (kernel, kodi, ffmpeg, and more) - it defeats the point of moving everything to a clean upstream codebase.
LE 9.2.6 remains the best option for 3D support.
So i understand, that MVC support maybe will come in the future on Pi 4? I'd like to use MVC contained in MKV not in ISO, will this work in the future too?
Thx to the Developing Team 