Most likely I’ve got a setting here that I don’t know about, but I have two models that I have explored extensively for setting differences and I cannot find anything. Of two test models, I have a “broken” one and a “normal” one. The “broken” one used to have a very complex model that has been completely deleted but continues to have strange shading “corruption”. The “normal” one behaves, well, normally. The difference is best seen by example…broken comes first:
And the “normal” model shows this:
Since I can find no discussions on this issue, I am assuming this is pilot error and not a bug. But I’m not a rank beginner and this started when I upgraded so I’m also suspicious that it might be a bug.