Meta ink, and meta nodes in particular, are just for the low-level implementation of dynamic building blocks—an alternative to code that should fade away as you build up an elaborate model from simple parts. While you can connect meta ink to a nested concrete point from both inside and outside the nested part, using concrete ink as an interface for sharing values doesn’t make much sense. We achieved this unification by designing a simple graphics system for concrete ink first, and then designing the supporting meta ink system to work with it by directly drawing/wiring from the meta to the concrete.