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I am making a mug where I generated the handle with extrusion (ctrl + E). While everything looks fine in solid display, the handle looks weird in Material preview display once I apply the texture. Please see below screenshot. The edges between each faces are so obvious and the faces are just alternating with very similar colors, which is so artificial.

enter image description here

I attached all the .blend and texture files: https://drive.google.com/drive/folders/1Gn7SL3unDlbgAjpGWleE2wZ9O6pNGUXu?usp=sharing

Not sure if the modeling is wrong in the first place or I need to do a different UV mapping, or anything else? Any help would be appreciated!

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  • $\begingroup$ weird, it looks like it has to do with the unwrap and the normal map? maybe first try to unwrap this part again $\endgroup$
    – moonboots
    Jan 9, 2022 at 21:47

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Looking at your blend file I see you have a lot of duplicated geometry, Merge by Distance removes 2240 verts. You also have a lot of faces with the Normals facing the wrong way -- in Edit mode click the Show Overlays drop-down and check the Face Orientation box to see them easily, then select some of the red faces and Mesh > Normals > Flip, continue until all outside faces show blue.

enter image description here

After that you probably do want to check your UV map, the islands are not well-positioned over the image.

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  • $\begingroup$ Thanks! I didn't realized that there are lots of duplicated faces. Good to know that! It looks the issue on the handle is because I removed the inner surface (surface facing the mug) to make it hollow. As a result, the texture looks strange. $\endgroup$
    – flyingbee
    Jan 16, 2022 at 16:02

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