Model glitching

Hi, Ramsey Aiken, it looks like the lights in your scene are missing, you can use default lights in the lights section. You can always check what all lights you've added to the scene in the left sidebar. When you're into Plugxr Grid, select any object in the scene -> Look for Light icon in the top right side of Navigation pane -> Click on Light icon -> select any of the default lights from the list.