Multiple Posts ALL describing the same issue
The total votes for all these "individual" posts should be sufficient for the bug to be being worked on based on the "In-progress" bugs.
Post number one: https://support.keenswh.com/spaceengineers/general/topic/se-version-1-188-1-weird-black-textures-showing-upVotes for it: 14
Votes for it: 17
Votes for it: 4
votes for it: 4
Post number five: https://steamcommunity.com/app/244850/discussions/0/3276824488714795374/
The last one is one on the Space Engineers Steam discussion page. From my own research (I have the same issue) it seems to be an issue with atmosphere of planets. Upon using this workshop planet: https://steamcommunity.com/sharedfiles/filedetails/?id=1549037799 the issue is fixed. The only thing different with this planet is the atmosphere.