hi guys, thanks for replay.

I tried
-undo = undo option doesn't work at all
-delete history doesn't help
-convert back to sub and than back to polygon = doesn't help
-try onther shader to it, yes it is help but just I got whole surface back, so I can see my f16 looks normal. but now I got 2 meshes on top of each other,


it is 2 meshes on top of each other, need remove one of them

do you know how? please don't tell me select the faces and delete the faces, it is 1000 of poly faces, tried do the merge vertex still doesn't help.

anyone smart here?