TACTIC has released Splattic Public Beta 4.0.0, which adds playback and editing of animated 4D Gaussian splats to its browser editor.
Splattic is a free, experimental editor that stages static 3DGS scenes alongside animated glTF, GLB and FBX meshes and publishes them as HTML, mobile web AR, or headset VR and XR for Quest Browser and Vision Pro Safari. It imports PLY, splat, ksplat, spz and sog files. Until 4.0.0, its splat support covered static scenes only. Animated splats have reached engines such as Unreal, where Volinga added 4DGS playback through Sequencer in July.
Splattic 4.0.0 opens .4dgs files, one per scene, and plays them alongside meshes and static splats. The 4DGS Player offers Loop, Once and Ping-pong modes, speeds from 0.25x to 4x, an SH level control, GPU or CPU evaluation, and spatial or stereo audio.
The 4DGS Edit mode trims clips with IN and OUT points, retimes and reverses them. Box, lasso and brush selections follow the selected splats through time, and deletions apply to the whole clip or only the IN to OUT range. Edits are non-destructive until Export edited .4dgs bakes them into a new file. A separate import path builds a 4DGS from a sequence of PLY or SOG frames, with settings for frame rate, correspondence and smoothing.
The Simplify tool gains a 4DGS mode with A, B and difference comparison and SSIM checks at several points in time, and it processes long clips in sections before stitching them back in order. A Tracks Editor places 4DGS and audio strips on one timeline.
Scene zips keep the original 4DGS file and its edit list. HTML zip exports embed smaller 4DGS files, and files above about 64 MB ship as a zip sidecar next to the page. AR zips either bundle the file or stream it from a hosted URL over HTTP Range requests. TACTIC notes in the changelog that "4DGS playback on real phones and headsets is not verified yet."
Splattic's third-party notices list the Apache 2.0 4dgs SDK from Avala AI, whose repository specifies .4dgs as a single-file, seekable container for moving splat scenes with optional spatial audio.
Splattic Public Beta 4.0.0 is free to use in the browser without an account.
