3D Print Material Rendering for Accurate Light Response
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Solution Overview
Problem
Current 3D printing technologies face challenges in preserving the visual characteristics of simulated materials, particularly in accurately representing directional light paths and material reflectance properties, which limits the fidelity of the final 3D print.
Innovation Solution
The method involves modifying digital lighting and materials in a 3D digital model using physically based rendering (PBR) to simulate characteristics like albedo, roughness, metalness, and transparency, and applying a linear weighted superposition of image parameters to generate a transformed 3D digital model that can be rasterized and printed, ensuring view-independence and accurate representation of material responses to illumination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If physically based rendering (PBR) is used to simulate material characteristics, then the visual fidelity of the 3D print is improved, but the computational complexity and processing time increase
Solution Approach 1:
The patent performs lighting modifications and material parameter adjustments in advance during the digital model preparation phase. By pre-computing the lighting-modified 3D digital model with adjusted digital lighting and modified digital materials, the system captures view-dependent visual characteristics before printing, eliminating the need for complex real-time rendering computations during or after the printing process.
Solution Approach 2:
The patent extracts and separates the view-dependent lighting and material properties from the base 3D model by creating a distinct lighting-modified version. This extracted lighting information and adjusted material parameters are then applied as modifications to the digital model, allowing the visual fidelity to be improved without embedding complex rendering computations in the printing system itself.
2Manufacturing precision
If digital lighting is modified to attenuate directional light paths, then the accuracy of light interaction representation is improved, but the complexity of the rendering process increases
Solution Approach 1:
The patent modifies lighting parameters by adjusting the digital lighting to attenuate directional light paths. This involves changing the lighting parameters to dim the digital lighting from specular reflection, thereby accurately representing how light interacts with the 3D model's surfaces. By modifying these parameters in the digital domain before printing, the system achieves accurate light interaction representation without adding physical complexity to the rendering hardware.
3Measurement precision
If multiple image parameters are stored for each surface point, then the material representation accuracy is improved, but the data storage requirements and processing load increase
Solution Approach 1:
The patent applies different image parameters at different locations on the 3D model's surface. By storing albedo color metric, roughness metric, metalness metric, and transparency metric specifically for each point of the surface where they are needed, the system achieves accurate local material representation. This localized application of multiple parameters ensures high material representation accuracy while avoiding the unnecessary storage of all parameters for all surface points.
Data Source
AI summary
Aspects of the disclosure are directed to three-dimensional (3D) printing. In accordance with one aspect, a method for generating a three-dimensional (3D) print include modifying a plurality of digital materials of a lighting-modified 3D digital model to generate a materials-modified 3D digital model based on a plurality of simulated characteristics; modifying one or more model parameters of the materials-modified 3D digital model to generate a parameters-modified 3D digital model; and transforming an interaction between a modified digital lighting and a modified digital material in the parameters-modified 3D digital model to generate a transformed 3D digital model.