sparkjsdev/spark v2.4.0

on GitHub

2.4.0 (Oct 19, 2026)

Bug fixes and improvements

Enhancements

• Add SPZ v4 read support (#484) (@udwinj, @mrxz)
• Decouple and abstract paged splat load logic from PagedSplat into FetchSource that retrieves data from in-memory file, URL or any other custom mechanism (#463) (@mrxz, @xohm
  , @oscarlorentzon)
• Switch to flate2 from zlib-rs backend for RAD deflate compression. ~50% faster compression, ~2-5% smaller outputs and ~20% faster decoding (#474) (@mrxz, @oscarlorentzon)
• Replace miniz_oxide with flate2 for Gzip (de)compression of SPZ files. Remove miniz_oxide as dependency (#485) (@mrxz)
• Address stutter during animations. Skip unnecessary splat sortings if the splat buffer needs or has changed like for example when LoD levels change or splats animate / move (#347) (#460) (@oscarlorentzon, @mrxz)
• Refactor PagedSplats into its own separate file (#462) (@mrxz)
• Remove outdated Github workflows CI commands (#464) (@mrxz)
• Add Rust linter (#414) (@mrxz)
• Improve tests (#483, #482) (@mrxz)
• Improve docs (#478) (@oscarlorentzon)

Bug Fixes

• (WebXR) Use camera projection projection matrix to calculate LoD pixel limit. The THREE.Camera fov value was incorrectly used before: It doesn't match the one reported by the WebXR API (#488) (@oscarlorentzon)
• Adress view-dependent color precission loss due to unwanted SH coefficinets clamping (#465) (@oscarlorentzon)
• Dispose the LoD index textures when renderer is disposed (#479) (@oscarlorentzon)
• Fix issue with Level 3 Spherical Harmonics (sh3) dropped due to incorrect type assertions. It introduces explicit types in PackedSplats and ExtSplats instead of loose types + assertions. (#467) (@mrxz, @oscarlorentzon)
• (WebXR) Fix issue with splat size and anti-alias blur rendered at half the correct width. Use whole viewport width for calculations instead of half (#487) (@oscarlorentzon)
• Ignore errors / rejections after SparkRenderer is disposed. This can happen when for instance there's pending LoD sorting in parallel in the worker when the renderered is disposed (#476) (@oscarlorentzon)
• Replace workers that hit a fatal error / crash / trap. The pool tried to reuse those in a broken state (#480) (@oscarlorentzon)
• Fix issue with long thin splats drawn off axis, too wide or too narrow. Compute 2D covariance eigenvectors without cancellation (#486) (@oscarlorentzon)
• Stop retrying a failed level of detail tree on every update (#477) (@mrxz, @oscarlorentzon)
• Address raycasting precission and speed issues (#469) (@n3ur0m4n, @oscarlorentzon)