Toshihiro "Tommy" Oshima has released Splat Dissolve V4.5, which places up to four light sources inside a gaussian splatting scene.
Splat Dissolve is a browser tool that makes a 3DGS scene come apart, with splats peeling away into the air, or assemble from scattered fragments, along a keyframed camera path. The effect can start nearest the camera, follow the path, run top to bottom, or spread from the center, and it can be confined to a keyframed sphere or cube. Fragments render as triangles, squares, particles, or the original soft splats, with controls for rise, swirl, linger, and edge glow.
Oshima, a visual artist, has also been converting Kenji Kohiyama's macro insect photogrammetry into Gaussian splats for a museum exhibition. Splat Dissolve V3.1, posted a day before V4.5, had five settings tabs and no lighting controls, and projects from V4.0 and earlier open in V4.5 with a single light set to make a flare.
Each V4.5 light can light the splats, make a lens flare, or both, and its position can be keyframed on the timeline's Light lane. Lighting brightens splats near the light and surfaces facing it, treating each splat's flattest axis as its surface direction. 3DGS colors already carry the light of the capture, so Splat Dissolve adds new light on top of the baked shading. No shadows are computed, and a light behind a building still lights what is in front of it.
Splat Dissolve V4.5 flares carry ghosts, a halo, a starburst, and god rays that leak through the gaps between splats. A Block by splats option dims a flare by how much of the light is covered and removes it when fully covered, and floating fragments make it flicker as they pass. Bloom and anamorphic horizontal streaks work on bright areas even without a light.
Splat Dissolve runs in Chrome, Edge, or Safari 16.4 and later, processes files without uploading them, and handles up to 4 million splats on computers and 1.2 million on phones. It reads SPZ v2 to v4, standard binary 3DGS PLY, colored point cloud PLY, and .splat, but not SuperSplat compressed PLY. Exports run from 5 seconds to 5 minutes at up to 3840x2160 and 60 fps in H.264, H.265, or VP9.
Splat Dissolve V4.5 is free to use in the browser.
