Are you using it with 3DShapes or 3DObjects?
if used with 3DObjects, you can look at having normals being included with your glb model. Then enable phong lighting, which smooths out lighting
https://kindeyegames.itch.io/c3-3dobject-alpha/devlog/786576/add-sample-sample-gpu-skin-with-phong-light
Thanks, it helped.
