AeneaGames
Member
That's exactly what I meant. The devs tells one interviewer Demon's Souls doesn't use RT reflections, but tells the other that they do use a form of ray-traced global ilumination. At this point I'm afraid only the devs know if they mean a hardware-based GI o just a software-based one like Nanite. In any case it seems clear to me that they were just answering different questions, and that's why we can find it a bit contradictory.
As I understood it, Lumen (not Nanite) still uses the GPU to calculate the bouncing rays of light. So to call it software based feels weird.
I think there can be a full software, running on CPU, implementation, a semi software implementation using the GPU (non RT GPU) for most calculations and a full GPU implementation.
Lumen is the second. I also remember reading that Lumen takes less GPU resources than using a GPU's RT capabilities.
I think we will see a lot of games going for the Frankenstein method. Use less resource heavy ways of creating RT like features wuthout using a GPU's RT extensions AND use real RT for things they can't use other methods.
I believe many of the Sony games are doing this and it looks marvelous so far!
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