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richgel999's profile
Rich Geldreich
Rich Geldreich
Rich Geldreich
@richgel999

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Rich Geldreich

@richgel999

Entrepreneur at http://Binomial.info , Khronos member working on Basis. Ex-Valve/MS,Age1DE,3/Halo Wars/Portal2/DotA2/CS:GO.

Portland, OR
sites.google.com/site/richgel99/
Joined March 2011

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    1. Rich Geldreich‏ @richgel999 Oct 22

      Here's kodim18 encoded to BC7 mode 6 RDO at 4.84 bpp 40.5 Y PSNR (12.8k endpoints, 12k selectors). Non-RDO BC1 gets 3.2 bpp 35.2 Y PSNR, and non-RDO mode 6 BC7 gets 6.7 bpp 47.5 Y PSNR.pic.twitter.com/OkRiAbP8Az

      3 replies 2 retweets 3 likes
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    2. Maxime Lebled‏ @MaxLebled Oct 23
      Replying to @richgel999

      That looks great, really curious of how well it performs with normal map content

      1 reply 0 retweets 0 likes
    3. Rich Geldreich‏ @richgel999 Oct 23
      Replying to @MaxLebled

      Do you use normal maps with BC7? Do you swizzle the components or just throw in XYZ as RGB and let the codec figure it out?

      1 reply 0 retweets 0 likes
    4. Maxime Lebled‏ @MaxLebled Oct 23
      Replying to @richgel999

      I've seen both approaches, some engines don't discard blue

      1 reply 0 retweets 1 like
    5. Maxime Lebled‏ @MaxLebled Oct 23
      Replying to @MaxLebled @richgel999

      In general I'm thinking from the point of view that at this time the visual quality of color/albedo textures is really great and the biggest strides have to be made with normal maps, shader masks, etc. where there are still a lot of blockiness artifacts to be found

      1 reply 0 retweets 0 likes
    6. Rich Geldreich‏ @richgel999 Oct 23
      Replying to @MaxLebled

      As I add more BC7 modes overall quality will improve. I’m adding mode 1 next. After that I believe I need modes 4 and 7 to handle decorrelated alpha and complex blocks with correlated alpha. The rest of the modes shouldn’t be necessary in my testing.

      1 reply 0 retweets 1 like
      Rich Geldreich‏ @richgel999 Oct 23
      Replying to @richgel999 @MaxLebled

      BC7’s blind spot are complex blocks with decorrelated alpha. It’ll never handle them particularly well.

      9:50 AM - 23 Oct 2018
      • 1 Like
      • Maxime Lebled
      0 replies 0 retweets 1 like

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