The Crotch said:
That said, some of the "non-dialogue text", like the descriptions that you get when you're in the private sensorium viewing the conversation between Deionarra and The Practical Incarnation, would be nearly impossible to replicate in a more natural way. So... that's probably something you'd have to approach on a case-by-case basis.
It'd be a fine line to walk. Some of the written texts describe things are very difficult to convey through visual medium, and would lose the "feeling" the game had. Given the nature of the isometric view of Planescape, it was very difficult to get a view of things. The descriptions would coincide with what was on screen, often enlivening in a way pure visuals simply can't. Like when you encounter O in the smouldering corpse:
'You see a man, standing stock still. He isn't moving a muscle. On closer examination, it appears that he isn't even breathing -- just standing. His eye sockets are empty holes in his face. Contained within their bounds is a flat gray light that seems to dance with possibility. Looking into the sockets, the eerie, empty feeling of a limitless void shivers through you, as if you had gazed into a sliver of eternity. The head slowly swivels toward you (you notice that no muscles appeared to move under his skin as he turns), and he speaks in a pure, bell-like tone: "Well met, wanderer. You have forgotten again, haven't you?"
"Do you know me, stranger?"
As he opens his mouth, you get that feeling of eternity again -- inside his mouth, you see no tongue, no teeth. It's almost as if this man were a shell surrounding an illimitable expanse. "I have spoken with you before, and always you forget. Your endless quest to discover yourself ends always in your amnesia. You draw close to the truth and recoil. Let us hope that you have the strength to endure your existence."'
On top of stuff like this, you have the memories of your past, like your brutal teachings of ignus, etc. Personally, I would leave the text descriptions, because its at the heart of what makes Planescape truly novel(heh), and would compromise its artistic vision.