Today I have tested a very simple scene on my Nexus 10 (Android 4.4.4). I’m using UE 4.4.0.
It contains just one static directional light, a global post process volume, a precomputed visibility volume and a simple static mesh. I have built the lighting before I deployed.
With Mobile HDR disabled I get the following image. Everything seems to render fine at 60 fps:
The same scene with Mobile HDR and post-processing turned on. First I thought there was a problem with my post process settings, so I disabled the post-processing entirely with the “show postprocessing” console command but the stripes remained (lowermost image, I changed the point of view because without post process effects the stripes are hard to see in a static picture, the shadow looks different because I added a static skylight and played around with lightmap resolution settings).
I have also tested the scene on my Sony Xperia V (Android 4.3). There I only got one horizontal stripe in the center of the screen, which was barely noticeable.
I’m not sure whether these artifacts are a bug or whether they could be caused by some wrong settings. I would be pleased if someone could help me.