Looks like a poor translation. I used google translate and it talks about lightning hitting a tree to set it on fire, which makes much more sense. Real-time lighting can also be done with rasterization instead of RT anyway.
"Q: Another word we've heard hundreds of times is ray tracing . Are we going to notice it so much? Lighting is a key element in Demon's Souls .
A: Indeed, one of the novelties is advanced lighting, now you will see more realistically when lightning hits a tree and sets it on fire. That is brand new and never existed in the original. Now we can do it because we have all that power with PS5. It's great. Demon's Souls for PlayStation 3 is an incredibly dark game. What we have done is, after evaluating the power of the PlayStation 5, we realize that we no longer had to activate or deactivate any light source, but we have been able to include light in real time thanks to advanced lighting techniques. So every aspect of the game lighting is in real time. It is dynamic. We have used the lighting as a way to guide the player through the levels, as little hints of where to go.
* We asked Sony about advanced lighting technique; apparently not Ray Tracing, but different. In the official blog it does appear as ray tracing. We await official confirmation to avoid a possible nomenclature confusion."