Crytek Discuss CryEngine On Xbox One - They Discuss Tiled Shading & Tiled Rendering On ESRAM
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"CryEngine has a unique and novel solution for this and was shipped with Ryse. One of the problems when using Deferred Shading is that it's very heavy on bandwidth usage/memory traffic. This gets exponentially worse as overlapping lights cause considerable amounts of redundant read and write operations. In Ryse our graphics engineers created a system called tiled shading to take advantage of the Xbox One.
"This splits the screen into tiles and generates a list of all the lights effective each title using a compute shader. It then cull's light by min/max extents of the tile. We then loop over the light list for each tile and apply shading.
"In practice this made for the biggest bandwidth save we could have hoped for, as just reading the Gbuffer once and writing shading results once at the end for each pixel. Only a single compute shader was used in Ryse for light culling and executing entire lighting and shading pipelines (with some small exceptions for complex surfaces like skin and hair)."
Read more at http://gamingbolt.com/crytek-shares-secrets-of-using-xbox-one-esrams-full-potential-resulted-in-big-bandwidth-saves#Q3zfPFkd8hfjT12D.99
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