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Forums - Microsoft Discussion - Xbox One eSRAM Readily Available For Any Purpose, Smooths Out Optimization: Dying Light Tech Director

kafar on 06 December 2013

yes, it is better than 360. good thing. very good.



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alabtrosMyster on 06 December 2013

Compared to just ddr3 for sure, it helps a lot.... Compared to a unified pool of gddr5 I would say it's a bottleneck.

 did they confirm the resolution of their game or we just have the vague assumptions thrown around freely at the begining of the article? Nowhere does the tech guy says that games will run at higher resolutions because of the edram setup



Pemalite on 06 December 2013
thewayofthepath said:

ETC2 texture compression, which is now part of the OpenGL standard, gives six times lossy compression for 24 bit textures.  32MB would only yeild the equivalent of 192MB.

Overview:  http://en.wikipedia.org/wiki/Ericsson_Texture_Compression

Detailed paper:  https://www.khronos.org/assets/uploads/developers/library/2012-siggraph-opengl-es-bof/Ericsson-ETC2-SIGGRAPH_Aug12.pdf

Of course, XBox One most likely uses something based off S3TC.

Zip would be useless as it takes too long to decompress in a 60 fps realtime setting.  (Or 30 fps, if you prefer.)

It would use 3Dc or 3Dc+ compression.

Problem with using S3TC and DXTC and other derivatives is that they might be "alright" at compressing textures, but when it comes to other aspects for example... Normal Maps, they fall incredibly short.

The other benefit to 3Dc and 3Dc+ is that it doesn't need any radical changes to how developers already implement compression.



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