Smooth Shading in Blender / GLTF / THREE.JS MeshPhysicalMaterial

This is how you get smooth shading on your meshes from Blender -> GLTF -> THREE (with a MeshPhysicalMaterial)   1. Export your mesh with smooth shading toggled on in the object’s Tools -> Edit menu. 2. Make sure material.flatShading=false  is set on your material. 3. If you still have problems, see this https://github.com/mrdoob/three.js/issues/347