The smooth shading in Three.js is giving off a flat appearance

When loading .stl files, I'm using MeshStandardMaterial without adjusting the flatShading property since it is set to false by default.

https://i.sstatic.net/zbCiR.png

The outcome appears rather dull to me. Even when attempting to toggle flatShading: true, the end result remains unchanged.

I've exhausted all my options and ideas - any recommendations would be greatly appreciated, thanks.

geometry.computeVertexNormals();
geometry.computeBoundingBox();
geometry.computeBoundingSphere();
geometry.normalizeNormals();
javascriptthree.jsstl-format

Answer №1

I am finding the outcome to be quite flat in appearance. Even when I attempt to enable flatShading: true, there is no change in the result.

When using STLLoader, it consistently provides a non-indexed buffer geometry (a collection of separate triangles). This means that the faces of the geometry do not share vertices, making it impossible for 

BufferGeometry.computeVertexNormals()
to generate the necessary normals for smooth shading.

Furthermore, recalculating bounding volumes and utilizing 

BufferGeometry.normalizeNormals()
will not address this particular issue.

To resolve this problem, you may need to ensure that the imported asset contains appropriate normals for achieving smooth shading. Another option is to experiment with BufferGeometryUtils.mergeVertices(), which combines vertices to create an indexed geometry.

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