Managed to install from a Chromebook rather than from RPi. Can't find anything relevant in either adb log or logcat. adb versions: 1.0.39 on pi and 1.0.41 on chromeb.
Very interesting approach. Heresphere seems to do it differently somehow.
IPD on my headset is set to 63mm. When I switch to mono at extreme close-ups like in Laundry it looks better.
If you are going with precalculating the depthmap, consider the LifecastVR approach. with two focus planes. Hugh Hou made one video with a close-up, it looked bad, maybe switch to 3dof there too. But the rest - vertical parallax, looking to the sides, inlining, head tilting, it is kinda solved.
I always say, tech is moved forward by the sex industry, financial gambling and edutaiment for kids. Eager to see your progress.