Copper Doors

All the doors work the same except the unique iron door. The iron door needs redstone to be opened. A copper door would work the same buy the copper door is solid. What I mean by this is that you can see through holes in the iron door, but have you ever wanted that surprise? Or maybe that hidden room that needs redstone to be opened but you want a visible door? Well that's where the copper door could be handy, a copper door would be a iron door but solid. This would make it have its own usefulness and uniqueness in minecraft builds or puzzles. Same would go for a copper trapdoor aswell. There is also the possibility to let these doors have aging aswell and be waxed.