Hi!

I would like to know if there is a way to get the second layer of the player skin, and render it in a custom way

I think that what you want can be solved with Layer Renderers. (I think, I'm not quite sure wha you want really)

extend Layer Renderer for the PlayerEntity and PlayerModel generic type parameters, and then override the render method. the layer renderer will always try to render, so you'll need to handle the condition logic of wether it should render or not.

to "register" this, just an instance of the layer to the player's renderer in the RenderPlayer event

Ok I will try, thanks