Need help to implement fresnel effect on the avatar model

Hi @everyone, Hope you are doing well.
I am a 3d graphics passionate and I am recently playing with Babylon.js with my clients.
I wanted to create an outline shader effect that can be managed by params.
From this forum, I found one I want exactly. Fresnel effect to the model
But the shader node material are replacing the original materials of the avatar model.
This is the playground: Babylon.js Playground
I tried to change the props of shader effect on inspect mode.
But I didn’t find a solution for it.
Is there any way to implement it? so putting the transparent shader material over the original material
Thanks for your reading and kind support.

closing as a dupplicate of Fresnel effect to the model - #7 by Meta_Land