Render of low poly model tris showing very hard/marked in three.js compared to sketchfab/unit3d/Iray

I’ve imported your FBX with the diffuse and normal map in the three.js editor. It looks like so with MeshStandardMaterial:

image

Looking at your code, I wonder why you are setting flatShading to true. This seems not right to me if you want a similar visual result like in the other engines/tools.

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