How to implement tranlucent material that don't take internal geometry into account?

What I want is just uniformly transparent appearance, but if you look at the attached image you see lot of things that appears in various shades of gray. Is that possible to get rid of them in a material?

I found this way of doing it that might be helpful.

Thanks! So, I will have to add another mesh that plays exactly the same animations as the main one? Is there a standard way to do so?

edit: to answer my own question, I used the same skeletal mesh and the same anim blueprint and it works