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The system now uses several 3D textures in order to decouple every steps of the volumetric rendering. See https://www.ea.com/frostbite/news/physically-based-unified-volumetric-rendering-in-frostbite for more details. On the technical side, instead of using a compute shader to populate the 3D textures we use layered rendering with a geometry shader to render 1 fullscreen triangle per 3D texture slice.