Rotating normal map via mapping node seems will flip normal map, resulting a weird looking material. But directly rotating uv map in uv editor doesn't cause any issue. So how to properly rotating a material using node which has a normal map? Thanks in advance! 0 degree rotation

180 degree rotation

Edit: .blend file added Here is the blend file

  • $\begingroup$ I can't reproduce this problem. What did you plug into the Mapping Node's Vector input? $\endgroup$ – FFeller Dec 13 '19 at 16:25
  • $\begingroup$ Thanks for reply, it's UV socket of texture coordinate node. $\endgroup$ – lee farcry Dec 14 '19 at 2:33

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