Just happened to me too. I had no issues the other day and made no driver or windows update since (did install a new firewall). Only installed a few sweethome3d plugins the last time, but all worked just fine then.

The 3d view window is grey now when opening the program, with no model. Then loading a model gives those artifacts above, in both the 3d view and planview (objects are all black). And everything is a mess. Tried reinstalling and got the same issues.

AMD Radeon Vega 8 integrated graphics