Tiny Online Tools
The part of the file nobody has ever seen
Most of a Gaussian splat file is spherical harmonics. At degree 3 each splat carries 45 coefficients — 15 per colour channel — against the 14 numbers that describe its position, size, orientation and opacity. Those coefficients are what stop a capture looking like painted fog: they make a colour a function of the direction you look from, so highlights slide across a surface as the camera moves.
They are also almost never looked at. This tool makes them visible three ways.
Band energy
Each band's mean coefficient magnitude, measured across the capture. Band 1 usually carries most of the view dependence; band 3 is often close to empty, in which case dropping it costs nothing visually and removes 21 of the 45 coefficients. The report also shows what the higher bands are costing in file size, so the trade is concrete.
The scene, band by band
The viewport can show the capture with only the flat base colour, then with band 1 added, then band 2, then band 3. Switching between them is the clearest demonstration there is of what the higher bands contribute — and a useful sanity check before converting to .splat, which discards all of them.
One splat, over the whole sphere
Pick a splat and its colour is evaluated over every view direction and drawn as an equirectangular map: columns are azimuth, rows are elevation. Four of those maps side by side — base colour, then each band added — show exactly where the highlight sits and how each band moves it. The raw coefficients are listed underneath, per band and per channel.
The splats offered are the ones whose colour varies most with direction, since picking an index at random on a million-splat capture almost always lands on something flat.
On large captures the search for those splats runs on a stride rather than over every splat, and the tool says so. The colour maps themselves are exact.
Everything is decoded and evaluated in a background worker inside this page. The capture is never uploaded.