3DGS Quality Compare — Side-by-Side Viewer
Compare two Gaussian Splatting files with synchronized cameras. See exactly how compression or editing affects visual quality.
Last updated Mar 2026
Drop 2 files here to compare side by side
e.g. original PLY + compressed SPZ of the same scene
What You Should Know
How the Comparison Works
Drop two 3DGS files (e.g., the original PLY and a compressed SPZ version of the same scene). Both are rendered simultaneously in side-by-side viewports with synchronized cameras — when you orbit, zoom, or pan one viewer, the other follows in real time. This lets you visually inspect quality differences at any angle without switching between tabs or tools.
What to Compare
Common comparison scenarios: (1) Original PLY vs SPZ/SOG compressed — check if compression introduced visible artifacts. (2) Different training iterations — compare an early checkpoint vs final result. (3) Before/after editing — see the effect of floater removal or region cropping. (4) Format comparison — same scene in SPLAT vs SPZ to evaluate SH preservation. The tool shows file size difference automatically so you can weigh quality against compression ratio.
Supported Formats
Both files can be any combination of PLY, SPLAT, SPZ, KSplat, and SOG formats. They do not need to be the same format — comparing a PLY original against its SPZ compressed version is the most common use case. Each file is rendered independently by Spark.js with full spherical harmonics support.