Couple things that I am trying to think of at the moment: does wood in BG3 burn? If i have a wooden crate, can I set it on fire to create temporary light source to help me in combat? What will happen if I put explosive materials into a container? If I cast a firebolt will it act as custom made explosive barrel? I actually never tried those things, might the next time I try.
While I suspected what the answers will be my experiments were as follows:
Containers are just containers - you damage them enough and they break. How they were broken, with what, or what's inside doesn't seem to matter. Crates, barrels, backpacks - once destroyed will spill what's inside. Curiously, pouches seem indestrictable. Now that is a quality protection for you valuables.
Explosives I played with seem to work in a very simple way - if damaged they go boom. It doesn't matter if you attack it with a sword or a spell, they will explode nonetheless.
One can light torches with fire spells but that I knew already. Fire surface does illuminate the area around it - though visually it is very unclear how far the light reaches, an ever present problem in stealth. Might use it in the future when fighting in the underdark - throw fire chromatic orb at the enemy and he should be in clear view.
At least I think I found the answer to the question I was asking myself - why does BG3 systemic design not work for me. The answer would be cause it's just bunch of disconnected systems that don't speak to each other - not in a way that would lead to interesting interactions at least. At least, in that regards it is faithful to original BGs - with BG1 attempt at guards catching you when you steal, or occasional scripted applications of spells. Not really an issue in itself, but just seems odd to me considering how much Larian seems to be sacrificing on the systemic altar.
Overall, I’d say the most memorable and impactful systemic sequences involve fire and/or explosions. That seems in line with Larian’s philosophy.
Yes, explosions, throwing/push and surfaces. Those seem to be the most fleshed out. I think it is fair to say that Larian is mostly interested in unexpected mayhem.
Ahh, cool systemic interaction - Sussur Flower. That's something Sven showcase as well - with pickpocket ability you can plant it on someone blocking their magic. That's something of Fallout quality.