Support transmission roughness on WebGL1 (#23460)
Support transmission roughness on WebGL1 (#23460)

* Support transmission roughness on WebGL1

* Update WebGLRenderer.js

Co-authored-by: mrdoob <59bd0a3ff43b32849b319e645d4798d8a5d1e889@mrdoob.com>
makc/three.js.fork,donmccurdy/three.js,greggman/three.js,aardgoose/three.js,donmccurdy/three.js,gero3/three.js,WestLangley/three.js,WestLangley/three.js,Liuer/three.js,06wj/three.js,mrdoob/three.js,makc/three.js.fork,mrdoob/three.js,aardgoose/three.js,06wj/three.js,gero3/three.js,greggman/three.js,jpweeks/three.js,jpweeks/three.js,Liuer/three.js