I’m about to do an old person thing: Balsamiq had (has?) something like this. You could mock up in whatever fidelity you wanted, but you could switch view mode

I’m about to do an old person thing: Balsamiq had (has?) something like this. You could mock up in whatever fidelity you wanted, but you could switch view modes and it would look like a sketch. Great for ensuring people didn’t get hung up on minutiae prematurely. It was wonderful. But I’m imagining what you’re describing as another level, where one would draw relationships and behavior … and visual presentation would be like textures applied to a scene’s wireframe.