SplatBridge — 3D Gaussian Splatting: Import, Stream & Play Real-World Scans

Bring real places into Unity with 3D Gaussian Splatting: explorable scans reconstructed from photos. Drop in a .sog, .spz or 3DGS .ply, add collision and gameplay, or take it to VR. Built-in, URP and HDRP are supported. Large captures stream under a fixed GPU budget — city-scale scans included. 📖 Full manual, troubleshooting table and tuning guide ship inside the package, in English and Japanese. 🎬 Demo video in the gallery above. All gallery images are unedited in-Unity captures. 💬 Support: publisher contact on this page. ## Import: one step, three formats **SOG** (PlayCanvas / SuperSplat), **SPZ** (Niantic, v3 gzip and v4 NGSP+zstd) and **3DGS PLY** (SH degree 0–3). Drop a bundled .sog, .spz or .ply into your project for a render-ready GaussianSplatAsset — no external converter, no command line. An unbundled SOG (meta.json plus its WebP files) imports through an editor menu instead, in the same one step. superspl.at datasets import as they are; to build a streamed SOG from your own .ply, use PlayCanvas's free splat-transform CLI (one command, in the README), then bake it in the editor. ## Rendering: every pipeline, correct compositing - **Every render pipeline.** Built-in, URP (Unity 6 Render Graph, with Compatibility Mode fallback) and HDRP (Custom Pass). Shaders ship inside the package and are included in player builds automatically — no "Always Included Shaders" setup. - **GPU depth sorting.** A radix sort in compute re-sorts the draw order as the camera moves, never on the main thread, with an automatic background CPU fallback where compute sorting is unavailable (specifics under Technical details). - **Render scale.** Draw splats into a downscaled offscreen target and composite: fill cost drops roughly with scale², UI and geometry stay full resolution. XR has a stereo-array version of the same lever. - **Correct compositing.** Splats depth-test against your scene, so scanned content sits behind walls and props instead of floating over them. - **View-dependent color.** The capture's SH bands 1–3 are evaluated per view, so gloss, glass and wet surfaces shift with the camera as recorded; switchable per object. In 1.0.4, Training color mode is the default for Linear projects; Legacy mode preserves the previous rendering. Far-field billboard baking now retains SH color and refreshes when SH settings change. ## Streaming: city-scale under a fixed budget Large captures do not fit in GPU memory, so SplatBridge streams them under a **hard resident-splat budget** you set once. If all finest full slices fit after page rounding and transition reserve, full detail stays resident automatically. Otherwise screen-space LOD adapts within the same cap. - **No per-dataset tuning.** Quality is judged in screen space, not by distance: the one quality knob, **Splat Quality Pixels (τ)**, means the same thing on a tabletop scan and on a city. It ships at a fixed **2 px on every platform**, so one scene ships to desktop, PCVR and Quest alike; an optional **Auto** preset resolves it per platform instead, letting mobile trade detail for fill automatically. - **Coarser, never holes.** The plan pays for every cell of the dataset before spending anything on detail, so an under-sized budget is absorbed by drawing the scene **coarser**, not by dropping parts of it. - **Know before you ship.** The bake log and the inspector report a **coverage gate** verdict up front: a budget too small even for the cheapest complete view is caught in the editor, not discovered on device. An optional debug log prints coverage, achieved quality, the error distribution and the frame-time knee, so tuning is measurement rather than guesswork. - **Fixed memory.** Max Resident Splats is a hard memory cap and the main performance lever — τ sets quality. The GPU buffer is allocated once at that size, with per-frame upload budgets, frustum culling and no-flash chunk swaps. - **Pre-baked, so the runtime never decodes.** A