Rhino 6 wip render view shading goes wrong


I am working in render view mode.
From time to time when I select objects or not, when I rotate camera in one or other position shading on some of objects goes very strange. And sometimes it is correct.

Is it possible to tweak setting so that I could have correct shading all the time?

Hello @Petras_Vestartas,

Are you using this week’s WIP? Please paste the version number here by going to Help -> System Information. The information looks something like this:

Rhino 6 SR0 2017-7-19 (Rhino WIP, 6.0.17200.20361, Git hash:master @ 34108fbe8968a15147893117e142da706294d7ba)

Also, do you think it would be possible to provide the file for us to inspect?