Internal Internal Loads a material color value into the @xeokit/viewer!Renderer.
@xeokit/scene!SceneMesh calls this when we update SceneMesh.color.
Internal Loads the SceneMesh's modeling matrix into the @xeokit/viewer!Renderer.
@xeokit/scene!SceneMesh calls this when we update SceneMesh.matrix.
Interface through which a SceneMesh loads attribute updates into a Viewer's Renderer.
This exists at each SceneMesh.rendererMesh when the containing SceneModel has been added to a Viewer.