Hi Presto, thanks for all your suggestions, I’ve tested all and can’t really see significant changes after applied it. I’ve tried to removed all the LOD just remain LOD 0 on the car and export to 3dsMax then re-import back to UE4 as usual. The problem is still occurred the same. Then I think the chrome part may be too thin that causing the issue, therefore I’ve changed the chrome to black glossy material that fixed the AA issue.