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AR content much larger then marker, very shaky, would love some help.

I have a large piece of machinery with a printed out marker above it. The marker is rated at 5 stars and is placed right above the the machine.

 

I'm using an 9.7 inch iPad Pro. The AR content is a video w/alpha that plays over the top of the physical machine. This makes the AR content much larger then the marker and the distance you need to be back from the machine in order for the video to overlay it 8-10 feet.

 

All of the time, the video shakes and skews at random times. I noticed some of the shaking come from the camera refocusing so I tried 'FOCUS_MODE_INFINITY', even though the documentation says it doesn't work in IOS and alas it does not. So I'm not sure how to fix the focus problem.

 

Since upgrading to the lastest version of IOS I am having an issue with the distance which was not an issue before.

 

Any help here would be greatly appreciated!

 

Thanks.