This is happening with Nasdara. When the looking in the direction of the sun the textures disappear and are replaced with geometric lines/colors. Quiting DayZ, opening another app to clear the cache, and reopening DayZ clears it up. It seems to happen during the transition from night to day. Like the sun isn't rendering correctly.
Jumping servers doesn't make it go away.
This is on official and vanilla community servers.
Reproduction steps
Load any server that is currently night, play till the sun comes up.