I am modeling some furniture and got a problem with flat shading of a surface. I first draw a rectangle, where the texture and shade were OK. After cutting two holes though, the shading got weird. Could you help me with this issue?

surface with flath shading problem

Shading nodes

  • $\begingroup$ you probably need to improve the topology, or try an Auto-Smooth? Or please pack the image and share the object: pasteall.org/blend $\endgroup$
    – moonboots
    Mar 31 at 15:57

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