In case you did not see the recent developer update, they stated they cannot reproduce the new shimmering effect that many of us have on buildings and other objects:
We are excited to share new updates to the VR Snapshot. We plan on closing threads marked as ‘duplicate’ and ‘unable to reproduce’ next week, but will evaluate feedback in them over the next few days before doing so. If you would like to help us with issues that we are unable to reproduce at this time, we invite you to help us by sending in more details in the appropriate threads so we can take a look.
If you have this issue then please contribute in the bug thread below as I believe this is the one looked at by the developers: