Might be cuz it is on dev mode! All the F keys will do that sort of stuff.
I'm not sure which one rn, but one of them will bring you back to normal shading!
你可能不相信我今天早上打开游戏时，它提示“UE4-Bloodbark 游戏已崩溃，将关闭”日志文件链接：https://www.jianguoyun.com/p/DfotriEQ4d6xDRjuvf8FIAA