Finally managed to read through GG presentation.
I'm slightly disappointed by cloud 'geometry' rendering, i thought it would be more advanced, but its really the simplest solution they could get. It probably would break hard if camera would try to dive into them with current implementation.
But man the whole talk about Powder algorithm was amazing, really interesting stuff. The whole lighting talk is excellent and probably the biggest highlight of the presentation.
Optimization seems like very bruteforce approach and i wonder if reprojection will break screenshots a little. Still, its the best they could do, so no complains there, its better to with it than without.
Generally seems like a tech that could be used by all studios and probably will be in point. It definitely has a lot potential for improvement, especially in terms of cloud movement, geometry and color gradients.
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Now time for Remedy's presentation.