MeshStandardMaterial and Specular Map

I can’t reproduce this with the following live example: Edit fiddle - JSFiddle - Code Playground

It just reports the expected warning: THREE.MeshStandardMaterial: ‘specularMap’ is not a property of this material.

Using a specular component when the lighting model already uses metalness is redundant (see Specular color map? · Issue #7290 · mrdoob/three.js · GitHub). Also see:

https://help.poliigon.com/en/articles/1712659-the-differences-between-metalness-and-specular-workflows