Strange artefact on iOS device

Hi all,

when launching my project on an iPad Air, I see some strange artefacts appearing sometimes when moving the camera around. The project is based on the first person blueprint template. The following image shows the artefact (a grey/black pixellated circle that pops out and then disappears):

50885-bug.png

You can also see the problem in a video: rendering problem with ue4 on iOS device - YouTube

The problem does not manifest while using the mobile preview on the desktop - only on the device.
I am using UE 4.8.2, iPad Air with iOS 8.4, Mac OS X Yosemite.

Could try disabling PostProcessing using show postprocessing on the console? That will tell us if this is a post processing issue, but I think it might a bloom issue.

-Pete

Ok, I’ll talk with some of the mobile rendering engineers and see if anything has changed from 4.7 to 4.8 in that area. I know we had this fixed at some point.

-Pete

Thanks for the very quick reply! Yes, disabling post processing gets rid of the problem.

I had bloom enabled in my project. I now have first disabled it via setting its intensity in the post-process volume to 0.0, but the issue remains.
By removing it from the project settings, the problem disappears.

Don’t know if it might be related, but I have disabled temporalAA (never get it to work on the device) and I am using MSAA on the device.