Actually your gif helped, I think I have it… standby.
indeed I had to watch the gif again. You are opening the component to paint it. don’t.
You are only painting the front face material and leaving the backface material untouched by doing this, as I said earlier. Put the bronze onto the outside of the component then you will replace all the default material front and back.
If you are painting the faces with a solid material, you need to reverse the faces and paint them too, then you should be able to edit it to transparent. Or paint the group itself with one of the glass materials to begin with.
now wait a minute. i have always been taught to paint INSIDE the group or component and not on the outside because it will cause issues further down the road… haha
Not necessarily problems down the road. Applying a material to the outside of a component or the faces inside the same component do very different things. There is an appropriate use case for each.