BC3 viewer

The bc3 viewer provides a precise, non-GPU path to inspect BC3 textures. It accepts BC3 bitstreams or binary texture data and renders a pixel-accurate representation for validation. It is intended for developers, texture artists, and QA teams who need to verify color endpoints, alpha fidelity, and block-level integrity before integration.
Conceptually, the tool decodes each 4x4 block by extracting color endpoints, building a small color palette, and applying per-block alpha data to reconstruct RGBA texels. It reports dimensions and per-block statistics to aid comparison against reference assets. It also supports exporting decompressed results for offline analysis.
Its unique value lies in providing a fast, deterministic view into compressed data that helps detect palette issues, alpha misalignment, and block-level artifacts early in the asset pipeline. Core features include BC3 block decompression, RGBA reconstruction, dimension reporting, per-block metrics, and export options for PNG or raw buffers. Common use cases include pre-pipeline validation, cross-platform compatibility checks, and automated QA checks within CI, ensuring texture quality without relying on GPU decoding.
The tool is suitable for graphics programmers, engine developers, and artists who need reliable insight into how BC3 data maps to pixels, and who require a compact, repeatable workflow for texture analysis.