Technical Features

Functional Features

As the LCC Unity SDK continues to improve, its features keep getting richer. It currently provides more than 90 APIs. The main functional features are listed below, and you can integrate them into your own project as needed.

No.	Feature	Description	Notes
1	Basic rendering	Supports full LOD0 rendering Supports dynamic LOD chunked rendering for large scenes Supports rendering with / without spherical harmonics Supports separate rendering control of subject data and environment data	Automatically distinguishes full vs. chunked rendering Supports object-level to city-level 3DGS data scenes
2	Multi-graphics-API support	Supports DX12, DX11, Vulkan and Metal graphics APIs	Adapts to various hardware platforms
3	OpenXR	Supports the OpenXR standard for VR devices	Adapts to various hardware platforms
4	3DGS / Point Cloud rendering	Supports both 3DGS and Point Cloud rendering modes
5	Single-scene / multi-scene mixed rendering	Supports single LCC scene rendering Supports mixed rendering of multiple LCC scenes (up to 255 LCC scenes) Supports mixed rendering of SOG / SPZ format files	Unified CPU memory / GPU video memory management to completely eliminate memory / video memory leaks and explosions
6	Dynamic lighting	Supports real-time dynamic lighting with point lights and spot lights	Does not rely on a Proxy Mesh, more flexible to use
7	Real-time shadows	Supports Meshes casting real-time shadows onto 3DGS surfaces	Does not rely on a Proxy Mesh, low overhead and high performance
8	Corner snapping	Supports corner snapping on 3DGS surfaces, snap cursor display and snap raycasting
9	Multi-camera rendering	Full rendering mode supports full-featured multi-camera rendering Chunked rendering mode supports multi-camera rendering at the same position and orientation	Allows multiple camera positions
10	Projected decals	Supports texture and dynamic video projected decals Supports projected decal depth occlusion
11	Orthographic / perspective rendering	Supports dynamic switching between orthographic and perspective rendering
12	HD video recording	Supports video recording at various resolutions (1080P, 2K, 4K, 8K)	Allows HD video recording at various sizes Not affected by monitor resolution
13	Real-time highlighting	Supports real-time selection highlighting (2D, 3D, Mix)
14	Real-time clipping	Supports real-time selection clipping (2D, 3D, Mix)
15	Real-time plane sectioning	Supports real-time horizontal and vertical plane sectioning
16	Real-time color adjustment	Supports real-time selection color adjustment (brightness, saturation, contrast)
17	Semantic coloring	Supports coloring by semantics of semantic data	Requires 3DGS primitives to carry semantic information
18	AI Box rendering	Supports visualization of lcb files recognized by AI	Mainly used for rendering AI detection boxes in the energy industry
19	Loading effects	Supports diffusion effects during data loading
20	Raycasting	Supports raycasting without a Mesh Supports raycasting with a Mesh Supports sphere collision detection with a Mesh Supports capsule collision detection with a Mesh	Built-in high-performance collision detection system
21	Dynamic FOV setting	Supports dynamic FOV setting of the rendering camera at runtime	Mainly used when the rendering host and display device are separate, such as wearing stereoscopic glasses
22	Alpha adjustment	Supports real-time adjustment of the global 3DGS opacity Supports independent opacity adjustment for each scene in multi-LCC-scene rendering
23	Data sources	Supports local disk data sources Supports network server data sources
24	Frame rate lock	Supports dynamic switching between locked and unlocked frame rate	Locked by default to optimize performance
25	Depth write	Supports real-time depth write	Limitation: the write granularity is coarse and may produce ellipsoid shapes
26	Real-time Mip / Non-Mip switching	Supports real-time switching between Mip and Non-Mip rendering
27	PCVR streaming	Supports Single Pass Instanced and Multi Pass PCVR streaming
28	Retrieving scene Mesh	Supports retrieving scene Mesh data either all at once or partially on demand
29	Small-point culling	Supports runtime dynamic adjustment of small-point culling to optimize performance
30	Render parameter settings	Exposes various render parameter settings, including total render buffer, on-screen render count, StartLOD, SSE factor and other APIs	Allows runtime dynamic adjustment of rendering performance and quality

Note:

Some features are limited to the PC platform (including Windows, Mac and Ubuntu);
Some features that depend on Render Features have differences in support across Built-in, URP and HDRP.

Performance

LCC rendering is a GPU-compute-intensive application. Rendering performance mainly depends on the following factors: screen resolution, CPU processing speed, GPU processing speed, and memory capacity and frequency. All splat counts in the table below refer to 3DGS splat counts.

PC

With an NVIDIA RTX 3060 GPU, an Intel i7-11700 CPU and 3200 MHz 32 GB of memory, at a resolution of 1800×1000, a rendering speed of 24 million splats @ 30 FPS can be achieved.

Mobile

Platform	Rendering speed
Android (mid-to-high-end devices since 2020)	2 million splats @ 30 FPS
iOS (iPhone 11 and later)	3 million splats @ 30 FPS

VR

Device	Rendering speed
Pico 4 Ultra	600,000 splats @ 30 FPS
Quest 3	600,000 splats @ 30 FPS