Hybrid Deferred Decoupled Rendering for High Frame Rates
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Solution Overview
Problem
Existing three-dimensional graphics processing systems face challenges in efficiently decoupling shading operations from geometry processing, leading to high computational workloads and reduced frame rates, especially in complex scenes with dynamic changes.
Innovation Solution
Implementing a decoupled rendering technique that separates visibility determination, shade space shading, and reconstruction phases, allowing shading operations to occur at a different frequency than geometry processing, thereby reducing the computational workload while maintaining high frame rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If shading operations are performed at the same frequency as geometry processing, then rendering quality is maintained, but computational workload increases and frame rate decreases
Solution Approach 1:
The rendering pipeline is segmented into distinct phases: visibility determination phase, shade space shading phase, and reconstruction phase. This segmentation allows shading operations to be performed at a different frequency than geometry processing, reducing computational workload while maintaining rendering quality. The visibility pass processes geometry once, while shading can be performed at lower frequency in the shade space shading phase.
Solution Approach 2:
The visibility determination phase performs preliminary processing to determine which pixels require shading and generates shade space visibility information. This preliminary action enables the subsequent shading phase to operate more efficiently by focusing computational resources only on visible pixels, reducing overall computational workload.
2Productivity
If shading operations are decoupled from geometry processing, then computational workload is reduced, but rendering complexity increases
Solution Approach 1:
A shade space buffer acts as an intermediary between the visibility determination phase and the reconstruction phase. The shade space visibility information is stored in this buffer, allowing the shading operations to be decoupled from geometry processing while maintaining the necessary spatial relationships. This intermediary structure enables independent processing of visibility and shading operations.
Solution Approach 2:
The patent introduces a shade space dimension that is separate from both object space and screen space. By transforming visibility information into shade space and performing shading operations in this intermediate dimension, the system achieves computational efficiency while managing complexity through a structured multi-space approach.
3Productivity
If shading operations are performed at lower frequency, then computational workload is reduced, but rendering quality may deteriorate
Solution Approach 1:
The visibility determination phase performs complete processing to accurately identify all visible pixels, while the shading phase can operate at reduced frequency. The shade space shading phase processes only the necessary visible regions identified in the visibility pass, applying partial action to maintain quality while reducing overall computational cost.
Solution Approach 2:
The reconstruction phase uses feedback from the visibility determination phase to guide the shading process. The shade space visibility information provides feedback about which regions need shading, allowing the system to adjust shading frequency dynamically while maintaining rendering quality in critical visible regions.
Data Source
AI summary
A technique for rendering is provided. The technique includes performing a visibility operation to generate shade space visibility information and reconstruction information; performing a shade space shading operation based on the shade space visibility information generate shaded shade space textures; and performing a reconstruction operation based on the reconstruction information and the shaded shade space textures.