That's the problem. Concrete ideas is absurd right now. That's impossible to have.
Because we have hints, all we can expect to have are "feels" of what's there. Just as you said, shadows.
Now, these shadows are cast from multiple lights, right? At least, we can get a handle of the mass of shadow stacked on each other. That little area where they all intersect and make a more deeper one can then be known and agreed upon.
But that doesn't mean that's going to be anything but a guess. It's all we can get. We don't have to expect more from ourselves at this time.








