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openclaw skills install @jaccen/3dgs-engineering-guide3dgs Engineering Guide
Guide for deploying 3DGS from research to production: 10 industry verticals, engineering stack, GIS toolchain solutions, cross-platform deployment, and common pitfalls
3DGS Engineering Guide
Bridging the gap from academic research to production deployment for 3D Gaussian Splatting.
Agent Instructions
When invoked, follow this workflow:
- Identify use case — determine application domain and constraints (platform, scale, real-time, budget)
- Recommend pipeline — select tools and pipeline from sections below
- Reference papers — point to methods in
references/3dgs-methods-overview.mdandreferences/methods-systems-apps.md - Provide concrete next steps — actionable items, not generic advice
- Warn about pitfalls — highlight domain-specific failure modes from Section 5
1. Industry Application Landscape
1.1 Autonomous Driving Simulation
Maturity: Engineering | Players: aiSim, Li Auto mindVLA, NVIDIA DRIVE Sim
Pipeline: Real-world scan (LiDAR + multi-camera) → 3DGS reconstruction → Sensor simulation → HIL/SIL testing
Key papers: GSDrive, GS-Playground (10^4 FPS, RSS 2026), GS-Surrogate, FieryGS, Nighttime AD GS, Real2Sim (4DGS + differentiable MPM), GS-SCNet, Ground4D, ULF-Loc (CVPR 2026 highlight), ConFixGS [2605.09688]
Quality bar: Sensor sim error < 0.02, LiDAR > 30 FPS, LPIPS < 0.1, Radar ±3 dB
Notes: ConFixGS provides plug-and-play confidence-aware diffusion repair for +3.68 dB PSNR on Waymo, applicable to pretrained feedforward models; LiDAR sim requires opaque surface Gaussians; OpenDRIVE co-registration mandatory; nighttime needs separate IR-adjacent training
1.2 Digital Twin & Smart City
Maturity: Commercial | Players: SuperMap, FantoVision, LCC
Pipeline: Aerial + streetview → Large-scale 3DGS → S3M conversion → GIS integration → IoT fusion
Key papers: DiffSoup, Street Gaussians, GlobalSplat, Large-Scale HQ Head
Standards: S3M (Chinese GIS), OGC 3D Tiles, glTF/glb, CityGML
Notes: City-level = 10^9–10^10 Gaussians; WGS84→ENU→3DGS alignment critical; streaming LOD mandatory; S3M needs custom exporter
1.3 Cultural Heritage & Museum
Maturity: Commercial
Pipeline: Controlled-lighting photography → High-fidelity 3DGS → Color calibration → Digital archive → VR/AR exhibition
Quality: Sub-mm geometry, ΔE < 2 (CIE76), 2048×2048+ texture, lossless compression
Notes: Dome/array lighting > flash; attach DOI/catalog metadata; store raw images + COLMAP + checkpoint + compressed .ply
1.4 Film & Game Production
Maturity: Exploration | Players: Volcengine, UE team, Tencent
Pipeline: Multi-camera capture → 3DGS → Mesh extraction (SuGaR/2DGS) → UE5 import → Virtual production
Notes: 3DGS→mesh needed for DCC; SuGaR (TSDF) > naive marching cubes; material separation (GOR-IS/SSD-GS) for relighting; 4DGS (GauFRe/DeformGS) for temporal consistency; UE5 Nanite+Lumen experimental
1.5 E-commerce 3D Display
Maturity: Commercial
Pipeline: Turntable photography → 3DGS → Compression (MobileGS/GETA-3DGS) → Web AR preview
Requirements: < 50 MB, browser-renderable (WebGPU/WebGL2 via gsplat.js), < 5s load on 4G
Notes: 50x+ compression needed for web; mesh fallback for low-end; AR needs mesh (Quick Look/Scene Viewer)
1.6 Industrial Inspection
Maturity: Engineering
Pipeline: Drone capture → 3DGS → AI defect detection → Measurement → Report
Key papers: EnerGS (LiDAR-3DGS fusion), RGS (CBCT inspection), E2EGS (end-to-end field)
Notes: GPS geotagging for defect correlation; EnerGS for LiDAR+cam fusion; detect ≥ 5mm at 10m; CAAC/FAA compliance
1.7 AR/VR/MR
Maturity: Exploration
Pipeline: Real-time headset scan → 3DGS → 6DoF tracking + low-latency render → MR overlay
Key papers: Mobile Avatar, GS-Playground, CoherentRaster (subpixel rasterization for light field)
Notes: < 20ms motion-to-photon; VkSplat for cross-VR; hybrid 3DGS+mesh for occlusion physics; Vision Pro = ARKit+Metal, Quest = OpenXR+Vulkan
1.8 BIM & Architecture
Maturity: Engineering | Players: LumenBIM × LCC
Pipeline: TLS + drone → 3DGS → IFC alignment → As-built verification → LCC delivery
Key papers: BrepGaussian (B-rep aware), CADFS (CAD feature saliency)
Notes: ICP registration before overlay; IFC coordinate mapping; LCC proprietary streaming format
1.9 Robotics & Embodied AI
Maturity: Rapidly Growing
Pipeline: 3DGS environment → Physics sim (GS-Playground) → Policy learning (sim-to-real) → Deployment
Key papers:
- GaussianGrasper (IEEE T-RO 2024) — Open-vocabulary grasping via SAM+CLIP feature distillation into 3DGS
- GraspSplats (CoRL 2024) — Zero-shot manipulation with 3D feature splatting; scene editing support
- ManiGaussian (ECCV 2024) — Dynamic GS world model for multi-task manipulation via future scene prediction
- GSMem (arXiv 2026) — 3DGS as persistent spatial memory for zero-shot embodied exploration & QA
- RoboSplat (RSS 2025) — Diverse data generation via Gaussian primitive manipulation; 87.8% success rate
- VR-Robo (RAL 2025) — Real-to-Sim-to-Real for visual robot navigation without depth sensors
- GS-Playground (RSS 2026) — 10^4 FPS batch 3DGS + parallel physics for robot learning
- Forecast-GS (arXiv 2026) — Predictive 3DGS for goal-directed manipulation planning
Sub-directions:
- Grasping & Manipulation — GaussianGrasper, GraspSplats, ManiGaussian, RoboSplat
- Navigation & Locomotion — VR-Robo, GS-Playground, MAGICIAN
- Embodied Reasoning — GSMem (spatial memory), Forecast-GS (predictive planning)
- Driving Policy RL — GSDrive (3DGS environment for reinforcement learning)
Toolchain: ROS2 (point cloud/depth topics), MuJoCo/Isaac Sim physics backend, GS-Playground (high-throughput sim)
Notes: 10^4 FPS sim transforms sample efficiency; ROS2 as point cloud/depth topics; debias with real-world fine-tuning; GraspSplats demonstrates NeRF unsuitable for scene changes — prefer 3DGS for manipulation tasks requiring scene editing
1.10 Military Simulation
Maturity: Early, classified | Security: GuardMarkGS (unified watermarking + edit deterrence for 3DGS assets)
Requirements: Air-gapped deployment, indigenous tools, > 60 FPS, sub-meter terrain, multi-spectral (visible+IR+SAR)
Notes: No foreign cloud/API; DEM/DSM fusion; no sensitive data in checkpoints
World Model Integration
3DGS is emerging as a core 3D primitive for world models across multiple domains:
| Domain | Method | 3DGS Role | Maturity |
|---|---|---|---|
| Autonomous Driving Simulation | RAD, DLWM, X-World | Twin digital world for RL/IL training | Production (XPeng, Momenta) |
| Robot Manipulation | GS-World, Spark 2.0 | Differentiable simulation engine | Research → Early Production |
| Interactive 3D World Generation | GWM, FlashWorld | Dynamics modeling primitive | Research |
| Web-Native World Model Rendering | Visionary | WebGPU rendering platform | Open Source (Shanghai AI Lab) |
Engineering considerations:
- Sim2Real gap: 3DGS simulation fidelity directly impacts policy transfer quality (RAD shows closed-loop RL in 3DGS reduces IL causal confusion)
- Real-time constraint: World models require ≥20fps for interactive use; 3DGS rendering speed is often the bottleneck
- Physical consistency: Standard 3DGS lacks physics; GS-World adds differentiable physics as simulation engine layer
- Scalability: Urban-scale world models need distributed 3DGS (BlitzGS pattern) + streaming (PD-4DGS pattern)
- Web deployment: Visionary demonstrates WebGPU + ONNX as viable path for browser-native world models
2. Engineering Technology Stack
2.1 Data Acquisition
| Device Type | Use Case | Key Requirements |
|---|---|---|
| DSLR/Mirrorless | High-fidelity capture | Manual exposure, fixed focal length |
| Drone (RTK) | Aerial survey | > 80% forward, > 60% side overlap |
| LiDAR | AD simulation, inspection | Time-synced with cameras |
| Mobile (LiDAR) | Quick indoor scan | iPad Pro/iPhone for rapid scouting |
| TLS | Architectural, industrial | Sub-mm accuracy for as-built |
Software: COLMAP (SfM+MVS standard), ORB-SLAM3/BLEPS (visual SLAM), LIO-SAM/FAST-LIO2 (LiDAR SLAM), FreeMoCap (AGPL-3.0, markerless MoCap from webcams, outputs .trc/.c3d/.fbx, pip install freemocap)
Key considerations: Camera calibration consistency, manual/HDR exposure, > 60% image overlap, GCPs for georeferencing, overcast preferred
2.2 Reconstruction
| Framework | Language | Best For |
|---|---|---|
| original 3DGS | CUDA/Python | Research, benchmarking |
| gsplat | PyTorch/CUDA | Custom training, differentiable |
| 2DGS | CUDA/Python | Mesh-extraction pipelines |
| Scaffold-GS | CUDA/Python | Large-scale scenes |
| OpenGaussian | OpenGL | Non-CUDA rendering |
| Scale | Gaussians | Training | GPU |
|---|---|---|---|
| Object/room | 100K–1M | 10–30 min | RTX 4070 |
| Building | 1M–10M | 1–3 h | RTX 4090 |
| City block | 10M–100M | 3–7 h | A100 80GB |
| City district | 100M–1B | 12–24 h | A100/H100 cluster |
Compression: HAC (100x), MobileGS (CPU-runnable), GETA-3DGS (5x), MesonGS++ (34x, SOTA rate-distortion), AdaGScale (adaptive)
Rule: No compression for prototyping → add when deployment demands; validate compressed vs original.
2.3 Post-processing
Mesh extraction: SuGaR (TSDF, clean meshes), 2DGS+Poisson, Marching Cubes (baseline, blobby), NeuS2-GS (hybrid SDF+Gaussian)
Material separation: GOR-IS (albedo/shading/normals), SSD-GS (scatter+shadow) — enables relighting
Relighting: GS³ (SH-based), GaRe, LumiMotion — critical for virtual production and e-commerce
Editing: GaussianEditor, ObjectMorpher, TransSplat, SuperSplat (PlayCanvas, MIT, browser-based: inspect/edit/compress/publish PLY & SOG; https://superspl.at/editor)
Toolchain: splat-transform (PlayCanvas, MIT, CLI) — PLY→SOG (~20x), PLY→streamed SOG (LOD), -K collision mesh (.collision.glb); npm install -g @playcanvas/splat-transform
MoCap input: FreeMoCap (AGPL-3.0) — webcam MoCap → SMPL/FLAME → drive GaussianAvatar/EmoTaG; same rig for MoCap + 3DGS training images; note: AGPL-3.0 not MIT-compatible for commercial use
2.4 Deployment
| Engine | Backend | Platform | 3DGS Native? |
|---|---|---|---|
| original 3DGS | CUDA | NVIDIA GPU | Yes |
| VkSplat | Vulkan | Cross-platform | Yes |
| GSeurat | Vulkan C++23 | Cross-platform | Yes |
| BlitzGS | Multi-GPU (parity sharding) | Distributed | Yes |
| msplat | Metal | macOS/iOS | Yes |
| tortuise | CPU (Rust) | Any CPU | Yes |
| PlayCanvas Engine | WebGL2/WebGPU | Web | Yes (first-class) |
| gsplat.js | WebGPU/WebGL2 | Web | Yes |
| @playcanvas/react | WebGL2/WebGPU | Web | Yes (Splats component) |
| UE5 plugin | DX12 | Desktop/Console | Plugin |
| Unity renderer | Vulkan/DX12 | Multi-platform | Plugin |
Streaming: CAGS (VQ + LoD, ~7x, chunked with global codebook), AV1-3DGS (AV1 motion vectors for SfM, 63% training reduction), PD-4DGS (progressive 4D streaming, DASH/HLS-compatible), progressive loading (coarse→fine), view-dependent prioritization, 20–50 Mbps for 1080p
Formats: .ply (uncompressed), .splat (compact binary, web-friendly), .sog (PlayCanvas, ~20x, streaming LOD, chunked with manifest), .spz (Niantic, ~10x, mobile/AR), custom (HAC/MesonGS++), future: 3D Tiles + Gaussian extension
2.5 Integration
GIS: SuperMap S3M extension, Cesium ion, ArcGIS (experimental)
BIM: IFC/STEP via BrepGaussian, Navisworks federated review, Revit as-built comparison
AD: OpenDRIVE + 3DGS co-registration, aiSim 6, ROS2 sensor topics
Game engines: UE5 (experimental Nanite-compatible), Unity (gsplat package), Godot (community, early), PlayCanvas (MIT, first-class 3DGS + collision + navmesh + physics + WebXR, @playcanvas/react)
Robotics: ROS2 scene server, MuJoCo/Isaac Sim, GS-Playground
2.6 The GIS Toolchain Gap: "3DGS Looks Good but Does Nothing"
The #1 pain point blocking 3DGS from production use (based on industry practitioner analysis, particularly WebGIS engineer xjjdjj).
After expensive drone surveys and 3DGS reconstruction, the resulting PLY file cannot: measure distances, cut cross-sections, calculate volumes, compute surface areas, query semantics, or overlay real-time video.
5 Root Causes:
- Format mismatch: 3DGS = unstructured Gaussian primitives; GIS expects structured geometry (mesh faces, point clouds with topology). No standard conversion layer.
- No spatial reference: 3DGS lives in arbitrary local coordinates; GIS requires WGS84/projected CRS.
- No semantic layer: No notion of "this group is a building" / "this surface is a road."
- No analysis primitives: GIS operates on mesh faces/edges/vertices; ray-Gaussian intersection is not a standard GIS operation.
- No real-time data fusion: 3DGS is static; live video overlay requires camera pose estimation + temporal sync + occlusion handling.
6 Solution Categories:
- Distance measurement: Raycasting through Gaussian field → surface point → Euclidean distance; or KNN surface estimation; project to vertical/horizontal plane first
- Cross-section clipping: Plane-Gaussian intersection; GPU shader real-time clipping; use cases: geological, architectural, pipeline
- Volume calculation: Voxelization (occupancy grid × voxel volume) or Gaussian integral (probability mass above reference plane); needs closed-surface assumption
- Surface area: Multi-view projected area (SH degree-0) or mesh extraction first (SuGaR/2DGS)
- Semantic enrichment: SAM/SAGA segment 2D → project to 3D Gaussians; or CLIP embeddings for semantic queries; map to CityGML/OGC
- Real-time video fusion: Camera calibration + SLAM pose → frame-to-3D projection → depth z-buffering → temporal progressive update
PlayCanvas Pipeline (3 CLI commands — first end-to-end open-source making 3DGS scenes interactable in browser; source: PlayCanvas Blog 2026-04):
splat-transform scene.ply --seed-pos 0,1,0 --voxel-params 0.05,0.1 \
--voxel-carve 1.6,0.2 -K scene.sog
npx glb-to-navmesh scene.collision.glb navmesh.bin
# Step 3: Bake lightness probes (in-engine, ~15s, ~40KB JSON)
| Component | Tool | Output | Size |
|---|---|---|---|
| Collision mesh | splat-transform -K (voxelization + flood-fill) | .collision.glb | ~1 MB |
| Nav mesh | recast-navigation | navmesh.bin | ~100 KB |
| Lightness grid | Probe script (cubemap luminance, Rec.601) | lightness.json | ~40 KB |
| Streamed SOG | splat-transform (LOD partitioning) | Multi-chunk .sog/ + manifest | ~5% of PLY |
Key insights: Voxelization + flood-fill = sealed collision meshes (no manual cleanup); lightness probes as JSON (no runtime raytracing, mobile-friendly); SOG streaming enables mobile deployment of million-Gaussian scenes.
GIS Toolchain Solutions:
| Task | Tool | Notes |
|---|---|---|
| PLY → 3D Tiles | libTileSplat, supermap-3dtiles | Cesium-compatible |
| PLY → collision mesh | splat-transform -K | Voxelization + flood-fill |
| PLY → nav mesh | splat-transform + recast-navigation | Collision GLB → Recast |
| PLY → compressed SOG | splat-transform | 20x, streaming LOD |
| Web 3DGS editor | SuperSplat | Browser-based, PWA |
| Spatial analysis | Custom Python (NumPy + plyfile) | Build custom GIS layer |
| Semantic labeling | SAGA | SAM → 3D projection |
| Lightness baking | PlayCanvas probe script | ~15s bake, ~40KB |
| Volume calculation | Custom voxelizer + PLY parser | Not yet standard |
| Cesium rendering | gsplat.js, cesium-3dgs-plugin | Three.js limited native support |
Standards progress: CSM group standard for 3DGS modeling initiated (2026-04); S3M extended for 3DGS; 3D Tiles extension proposals
3. Best Practices
3.1 Quality Assurance
Geometric: Chamfer Distance, F-Score (τ ∈ {1mm, 5mm, 10mm}), normal consistency
Visual: PSNR/SSIM/LPIPS — WARNING: insufficient for engineering use; human evaluation required for sign-off
Engineering metrics: sensor sim fidelity vs real data, real-time FPS (30/60/90+ by domain), memory footprint, time-to-first-render, rate-distortion curves
3.2 Scalability
- Scene splitting: octree/voxel grid, ~1M Gaussians/cell, overlap zones for seams
- LOD: multi-resolution hierarchy, distance-based switching, view-dependent refinement
- Streaming: camera pose → spatial index → LOD + frustum culling → compress → transfer → decompress & render
| Scenario | Compression | Ratio | Quality |
|---|---|---|---|
| Prototyping | None | 1x | None |
| Desktop | GETA-3DGS | 5x | Minimal |
| Mobile | MobileGS / CAGS | 10–50x | Moderate |
| Web | MesonGS++ + .splat/SPZ | 30–50x | Acceptable |
| Large-scale | HAC + progressive / CAGS | 50–100x | Significant |
3.3 Cross-Platform
| Platform | Backend | Fallback | Max Scene | Real-time? |
|---|---|---|---|---|
| Desktop (NVIDIA) | CUDA | Vulkan | 10M+ | 60 FPS |
| Desktop (AMD/Intel) | VkSplat | GSeurat | 5M+ | 30 FPS |
| Desktop (CPU) | tortuise (Rust) | — | 500K | No |
| macOS (Apple) | msplat (Metal) | — | 3M | 20 FPS |
| iOS | Metal | — | 1M | 15 FPS |
| Android | Vulkan | WebGPU | 1M | 15 FPS |
| Web | WebGPU | WebGL2 | 500K–2M | Varies |
| VR (Quest 3) | Vulkan (OpenXR) | — | 2M | 72 Hz |
| VR (Vision Pro) | Metal | — | 3M | 90 Hz |
Checklist: target GPU family, VRAM fallback to lower LOD, color space (sRGB/linear/HDR), min-spec hardware, memory leak testing over extended sessions
3.4 Data Pipeline Automation
CI/CD: Data validation → COLMAP SfM+MVS → 3DGS training → quality gate (PSNR/F-Score) → compression → deploy to CDN → alert on regression
Quality gates: PSNR < 28 dB = flag; geometric drift > 5mm = flag; coverage gaps; floater/needle artifacts
Versioning: Raw images + COLMAP in git; checkpoints (.ply) in git LFS/DVC; semantic versioning; changelog per version
Monitoring: FPS P50/P95/P99, Gaussian count, file size, data freshness, user engagement metrics
4. Decision Trees
4.1 By Use Case
- AD simulation → aiSim 6 / CARLA + 3DGS plugin + OpenDRIVE + ROS2
- Digital twin / Smart city → SuperMap GIS + LCC streaming / S3M
- Cultural heritage → Polycam (capture) + COLMAP + 3DGS; Luma AI (preview)
- E-commerce → gsplat.js / three.js + compression
- Film / Game → UE5 plugin + SuGaR (mesh) + material separation
- Industrial inspection → DJI + COLMAP + 3DGS + YOLO/SAM
- Robotics → GS-Playground (sim) + ROS2
- Avatar / MoCap → FreeMoCap + GaussianAvatar/EmoTaG + SMPL/FLAME
- BIM / Architecture → LCC + IFC alignment + as-built verification
- Research → original 3DGS + gsplat + custom extensions
4.2 By Platform
- Desktop (NVIDIA) → CUDA backend
- Desktop (AMD/Intel) → VkSplat / GSeurat
- Mobile (iOS/Android) → VkSplat / msplat (Metal) / WebGPU
- Web → gsplat.js / three.js / PlayCanvas Engine + @playcanvas/react
- VR headset → OpenXR+Vulkan (Quest) / Metal (Vision Pro)
4.3 By Scene Scale
- < 100K Gaussians → original 3DGS, 5–15 min on RTX 3070+
- < 10M → Scaffold-GS + GETA-3DGS (5x), 30 min–2h on RTX 4090
- < 100M → Spatial partitioning + MesonGS++ (34x), 2–7h on A100
- > 1B → LCC + S3M + HAC (100x), distributed 12–48h on GPU cluster
5. Common Engineering Pitfalls
- Over-fitting to training views: Artifacts at novel viewpoints. Fix: more viewpoints at different elevations, depth/opacity regularization, validate on held-out views.
- Floating artifacts: Semi-transparent blobs in empty space. Fix: depth regularization, opacity pruning (α < threshold), post-processing depth filter.
- Memory explosion at scale: GPU OOM > 10M Gaussians. Fix: spatial partitioning from day one, Scaffold-GS anchors, streaming for > 10M.
- Sensor sim fidelity ignored: High PSNR but inaccurate LiDAR/Radar. Fix: validate sensor outputs vs real data; opaque surface Gaussians for LiDAR; calibrate Radar cross-section.
- CUDA lock-in: Cannot deploy to AMD/Intel/Mobile. Fix: VkSplat/GSeurat (Vulkan), msplat (Metal), tortuise (Rust CPU), brush (Rust/WebGPU/Burn, most complete cross-platform: Win/Mac/Linux/Android/Web, 4.3k stars, faster than gsplat); abstract CUDA behind interface.
- No version control for 3DGS: Cannot reproduce/track changes. Fix: git LFS or DVC; separate metadata (YAML) from binary; semantic versioning.
- Static lighting assumption: Breaks under different lighting. Fix: plan relighting upfront; GOR-IS/SSD-GS decomposition; GS³/GaRe SH-based relighting.
- Temporal inconsistency: Video flicker, object jumping. Fix: 4DGS (GauFRe, DeformGS, ScubeGS); temporal smoothness loss.
- Under-estimated compression artifacts: Visible holes, color shifts. Fix: rate-distortion benchmarks first; domain-specific metrics (not just PSNR); uncompressed reference for comparison.
6. Reference Papers
| Domain | Methods |
|---|---|
| AD Simulation | GSDrive, GS-Playground (RSS 2026), GS-Surrogate, FieryGS, GS-SCNet, Ground4D, ULF-Loc (CVPR 2026), Nighttime AD, Real2Sim, ConFixGS (+3.68 dB Waymo) |
| World Models | GWM, FlashWorld, GS-World, Visionary, RAD, DLWM, X-World |
| Digital Twin | DiffSoup, Street Gaussians, GlobalSplat, Large-Scale HQ Head |
| Inspection | EnerGS, RGS, E2EGS |
| Physics | PhysGaussian, Gaussian Splashing, GS-Playground |
| Relighting | GS³, GaRe, SSD-GS, LumiMotion, GOR-IS |
| Cross-platform | VkSplat, GSeurat (Vulkan C++23), msplat (Metal), tortuise (Rust CPU), brush (Rust/WebGPU, 4.3k stars), AdaGScale, BlitzGS (distributed) |
| Feed-Forward | SplatWeaver [2605.07287] (expert-routing, 30% budget reduction, 301 FPS, no calibration; code: github.com/yecongwan/SplatWeaver) |
| BIM/CAD | BrepGaussian, CADFS |
| Editing | GaussianEditor, ObjectMorpher, TransSplat |
| Security | GuardMarkGS (watermarking + edit deterrence) |
| Rendering | CoherentRaster (subpixel, light field), 3DGEER (exact ray, ICLR 2026), SparseOIT (order-independent transparency) |
| Streaming | CAGS (~7x VQ+LoD), AV1-3DGS (63% training reduction), PD-4DGS (progressive 4D streaming), MGS [2603.19234] (Matryoshka continuous LoD, single model multi-fidelity) |
| Acceleration | AdpSplit [2605.06876] (error-driven adaptive split, drop-in for 9-22% training speedup) |
| Compression | HAC (100x), MobileGS (CPU), GETA-3DGS (5x), MesonGS++ (34x), AdaGScale |
See knowledge base: references/3dgs-methods-overview.md, references/methods-core.md, references/methods-semantic-editing.md, references/methods-systems-apps.md
7. Terminology
- Cardinality Gaussian Expert Routing: Routing mechanism where discrete experts predict different numbers of Gaussians per pixel based on scene complexity (cf. SplatWeaver)
- Skew-Normal Splatting: Using Azzalini skew-normal distribution instead of symmetric Gaussian for asymmetric boundary representation
- Stochastic Budget Training: Training strategy that randomly samples Gaussian budget each iteration to learn ordered, LoD-compatible representations (cf. MGS)
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