Resolving line of sight through areas like forest is a challenge in tabletop gaming. Trees? Or wood?

Heard of mycorrhizas? Turns out most plants are bonded at their root
with a fungus, symbiotically. The fungus sends minerals up from the earth; the leaves send sugars down. Can these be divided?

We thought a tree was a tree - now we know it's more. But we still say 'tree', as if it's one, alone. How much interconnection does language hide..?
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