Richard Geldreich's Blog

Co-owner of Binomial LLC, working on GPU texture interchange. Open source developer, Open Geospatial Consortium member, graphics programmer, former video game developer. Worked previously at SpaceX (Starlink), Valve, Ensemble Studios (Microsoft), DICE Canada.

Thursday, April 9, 2026

XUASTC's next step: Intra-prediction of weight grids

Binomial has shown that image compression and GPU texture compression aren't separate fields . They're the same field, and the tools...

Thursday, April 2, 2026

First XUASTC LDR 4x4 rate-distortion graphs

ASTC GPU texture blocks form a latent image space where JPEG techniques still work . (So does BC7.) Here's a XUASTC LDR 4x4 (arithmetic ...

Monday, March 9, 2026

Open Geospatial Consortium membership

I'm now a member of the OGC: https://www.ogc.org/

Basis Universal v2.1 library wiki mirror

It's been automatically converted to HTML and mirrored outside of GitHub here: Home . A static mirror of the GitHub repo is here .

Sunday, March 8, 2026

The KTX-Software repo has been forked

Binomial LLC has forked the Khronos Group's KTX-Software repo, to use as a staging ground for next-generation GPU texture compression te...

Wednesday, March 4, 2026

Degenerate but valid ASTC configs: suboptimal CEM encodings

See: https://github.com/BinomialLLC/basis_universal/wiki/List-of-Available-Software-ASTC-Decoders#degenerate-but-valid-astc-configs-subopti...

Updated: "ASTC GPU Texture Decoding: Software Decoders, Spec Issues, and ARM Errata"

ASTC's complexity has created an ecosystem where correctness is an ongoing research problem rather than a fully solved one. See: https:...

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About Me

Rich Geldreich: Seattle, WA, United States; Back in the day I worked for several years at Digital Illusions on things like the first shipping deferred shaded game ("Shrek" - 2001), software renderers, and game AI. Then, after working for Microsoft at Ensemble Studios for 5 years as engine lead on Halo Wars, I took a year off to create "crunch", an advanced DXTc texture compression library. I then worked 5 years at Valve, where I contributed to Portal 2, Dota 2, CS:GO, and the Linux versions of Valve's Source1 games. I was one of the original developers on the Steam Linux team, where I worked with a (somewhat enigmatic) multi-billionare on proving that OpenGL could still hold its own vs. Direct3D. I also started the vogl (Valve's OpenGL debugger) project from scratch, which I worked on for over a year. In my spare time I work on various open source lossless and texture compression projects: crunch, LZHAM, miniz, jpeg-compressor, and picojpeg.

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