Virtual Object Exterior Rendering With Clear Coat Illumination
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Solution Overview
Problem
Existing methods struggle to accurately render the texture and visual effect of virtual object exteriors in online games, resulting in poor rendering quality.
Innovation Solution
Determine a first specular value of a clear coat layer, obtain an original reflection value and transmittance, calculate a reflection and second specular value based on these, and perform illumination rendering to enhance the visual effect of virtual object exteriors using a target illumination value.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional material-based exterior rendering (cloth, silk, metal) is used with different colors and textures, then diversified exterior presentation is achieved, but the real texture and visual effect of exterior materials cannot be manifested
Solution Approach 1:
The exterior surface is segmented into multiple layers including base layer, intermediate layer, and clear coat layer. Each layer has distinct material properties and optical characteristics that can be independently controlled and rendered, allowing realistic simulation of complex material structures while maintaining visual diversity.
Solution Approach 2:
The patent applies physical-based rendering by dynamically adjusting material parameters such as roughness, metalness, clear coat glossiness, and thickness based on lighting conditions and viewing angles. This enables accurate representation of real material textures while maintaining versatility in exterior design.
2Productivity
If simple color and texture mapping is used for exterior rendering, then rendering efficiency is maintained, but the visual effect and realism of exterior materials are poor
Solution Approach 1:
Material properties and optical parameters are pre-calculated and stored in material definition files during asset creation. This preliminary preparation allows the rendering system to efficiently retrieve and apply accurate material characteristics without real-time computation overhead, maintaining both speed and visual fidelity.
Solution Approach 2:
The patent replaces traditional mechanical texture mapping with physics-based optical rendering models that simulate light interaction with materials. This substitution uses mathematical models of light reflection, refraction, and absorption to achieve realistic material appearance while maintaining computational efficiency through optimized rendering pipelines.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Improves the visual rendering of virtual object exteriors by accurately simulating the texture and illumination effects, enhancing the appearance of virtual objects in online games.
Implementation Method 1
determining a first specular value of a clear coat layer of the virtual object under a light source
Implementation Method 2
a transmittance of the clear coat layer is obtained
Data Source
AI summary
In an exterior rendering method for a virtual object, a first specular value of a clear coat layer of the virtual object under a light source is determined. The clear coat layer covers an exterior surface of the virtual object. An original reflection value of the exterior surface and a transmittance of the clear coat layer are obtained. A reflection value and a second specular value of the exterior surface under the light source are determined based on the original reflection value and the transmittance. A target illumination value is determined based on the first specular value, the reflection value, and the second specular value. Illumination rendering is performed on an exterior of the virtual object based on the target illumination value.