[quote=@thewizardguy]
I'm making a GM call that creatures and objects created by the hallucinations are Constructs, they are generated and given shape by James and his mind. As such, when James' attention shifts, they simply cease to exist. They exist in the physical world only for as long as they exist within his mind.

This also means that knocking out James, or killing him, would instantly destroy anything created by his delusions. Much in the way that water only maintains the shape of it's container, the container being formed from James' mind.

This can, of course, be debated if anyone has different opinions on this matter.
[/quote]

That sounds like a good idea. You can have clear limitations and stuff then.
But I assume the constructs have their own will? Based on his own psyche. Would they know things he can't know?
If I shuffled a deck, drew a card and showed it to a construct but not to James. Would that figment of James's imagination know what card I drew?

If James imagines the T1000 and the T1000 encounters a locked door, which he opens by sticking his liquid hand in the lock and duplicate the key. Is it a problem that Jame's doesn't know what the key is supposed to be shaped like and thus cannot imagine the T1000 in the exact shape needed to open the door?

If James imagines a torch and sets things on fire, then forgets about the torch, does the fire disapear? Are burns healed? Are wounds caused by his constructs permanent at all?

There are many pointless questions that keep me up at night. Fun right?