My assembly model is displayed as all black. What I've tried: Checking that lights are enabled; using software rendering changes only blackness to a grey speckled texture (so it's not the videocard driver...). The change to this erroneous display style happens upon saving and some rebuilds. I updated to 2025 from 2024 because I was hoping this problem would be fixed. In the past I was able to force a refresh to correct graphics by going into a part isolate, exiting the isolation, and then changing from wireframe to filled-in display style. Now that no longer works. I am forced to work in wireframe mode until this problem is remedied somehow.