Light Baking Path Guiding for Accurate Scene Ray Sampling
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Solution Overview
Problem
Current light baking methods in game development result in low rendering quality due to ineffective ray sampling in complex scenes, leading to inefficient use of computational resources and time.
Innovation Solution
Implementing path guiding to optimize ray sampling by using a spatial directional tree, which reduces unnecessary ray samples and improves the accuracy of incident ray distribution, thereby enhancing rendering quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional light baking methods are used in complex scenes, then rendering can be performed, but rendering quality is low due to ineffective ray sampling
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing light path information in a spatial directional tree before rendering. This allows the rendering system to query pre-computed light paths instead of performing expensive real-time ray tracing, thereby improving rendering quality while reducing the number of ray samples needed during actual rendering
Solution Approach 2:
The patent introduces a spatial directional tree as an intermediary data structure that stores light path information. This intermediary allows the system to avoid direct expensive ray tracing operations by querying pre-computed light paths, thus improving rendering quality without requiring numerous ray samples
2Measurement precision
If more ray samples are used to improve rendering quality, then rendering accuracy increases, but computational time and resources increase
Solution Approach 1:
The patent performs preliminary computation of light paths and stores them in the spatial directional tree before rendering. This pre-computation transfers the computational burden from real-time rendering to an offline preparation phase, allowing accurate incident ray distribution without increasing real-time computational time
Solution Approach 2:
The patent creates a copy of light path information in the form of the spatial directional tree structure. Instead of repeatedly computing light paths during rendering, the system copies and reuses pre-computed light path data, thereby maintaining accuracy while reducing computational time
3Productivity
If traditional ray sampling is used, then rendering can be performed, but computational resources are inefficiently utilized
Solution Approach 1:
The patent extracts light path information from expensive real-time ray tracing operations and stores it separately in the spatial directional tree. This extraction allows the rendering system to use efficient queries on pre-computed data instead of performing resource-intensive ray tracing during rendering, thereby improving productivity and reducing computational resource waste
Solution Approach 2:
The patent creates a copy of light path data in the spatial directional tree structure, enabling efficient retrieval and reuse without repeating expensive computational operations. This copying mechanism improves rendering efficiency while minimizing computational resource consumption
Data Source
AI summary
This application describes a rendering method and apparatus, a device, and a storage medium. The method comprises: determining a texture element in a to-be-rendered scene, and determining a target spatial directional tree corresponding to the to-be-rendered scene. The target spatial directional tree represents an incident ray distribution corresponding to the texture element in the to-be-rendered scene. The method further comprises determining, based on the target spatial directional tree, a scene spatial region for the texture element, determining the incident ray distribution corresponding to the texture element based on a quantity of light paths and light energy in the scene spatial region; and determining a light rendering result corresponding to the texture element based on an incident ray corresponding to the incident ray distribution.