Im new and Need Help with Medieval Game Environment (material turn to black)‏

hi, i had a problem when i try to do new level or migrate assets some of material turn to black and the materials luck like bugged before i do new level or migrate Pls Help me with this

notice: my english is bad so i made a video to show u the problem!

ue4bug_Trim|video

Sure that looks weird and might be a bug. I’d suggest you to try duplicating your working level and just make changes over the duplicate. It’s not a proper long-term solution but it may do the trick this time.

thank you for your comment i will try this