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A uv map maps a point (x,y,z) in the mesh to a point (u,v) in the texture image. Since an image maps (u,v) to a color, the two maps can be chained, yielding a map from the mesh space to the color space. uv map color map (x,y,z) -> (u,v) -> color mesh Texture space space


This isn't really a THREE.js problem (although THREE.js may limit your options for a solution); it happens with any terrain implementation of that type. From the screenshot, it looks like you're using a regularly-tessellated grid of geometry where each vertex is mapped to a height map point. Such a grid generally generates triangles in a pattern, for ...

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