[Boulder]

I can't watch MotionFlow because of the number of spurious artefacts it introduces

I set Smoothness to 2 (out of 5/Max) (plus Film mode/CineMotion to High) for the X1 Extreme based BRAVIA X900F and it is perfectly fine for me.

X1 Ultimate based BRAVIAs only have 3 notches for Smoothness IIRC. Dunno how Motionflow behaves there.

I noticed that if I select all the resolutions in the whitelist so that the X900F does all the upscaling to 4K, I get jerky movement at times if MotionFlow is True Cinema (didn't test custom settings). Film mode can bet set to High without any issues. I wonder why that happens? The sources have been normal movies at 23.976 fps, resolutions ranging between 1280x536 - 1280x720.

With my set top cable box outputting the video as it is broadcast, there's no problem enabling True Cinema and Film mode High.