Problem with add Rocket Window material

Good evening! Do all like the lesson, but when add RocketGrey material to RocketWindow it turned out like this....First think what create incorrect material ,but when i add another material it turned out a similar result....when i deleted window material the problem disappears...need your help comrads!)

  • Grant Wilk(grantwilk) replied

    Uh oh, that looks like a really bad bug in Blender 2.8 to me. Does it do this in other projects where you have multiple materials assigned to a single object, or just this one?

  • gandurasec replied

    I fixed this bug when deleted RocketFuselage material, and i have "naked" fuselage(haha))) . This project is my first project when i added material on geometry.