How to change appearance(baseColorTexture) of a preload glb runtime?

[BigMac1771]

Im a beginner in 3D development. I import a glb object into environment.env with predefined textures(baseColorTexture, normalTexture, occlusionTexture), and I try to change the appearance(runtime) when clicking buttons.

Here are my code,  but It didn't work to change the texture (baseColor or baseColorTexture).

Is there anyone could help me? Thank you very much.

private fun changeMaterial(node : SceneObject) {

        val material = node.mesh?.materials?.get(0)

        var mesh = node.mesh

        var meshMaterial = node.mesh?.getMaterial(0) as SceneMaterial

        var test_texture = SceneTexture(activity.getDrawable(R.drawable.test_texture))

       //var texture_name = "baseColor" //--> exception: baseColor not found

        var texture_name = "occlusion" //--> worked and texture is changed

        meshMaterial.setTexture(texture_name, test_texture)

}