Bridging the gap from Physically Based to Predictive Rendering

OPTIS ANSYS explains how optical simulation supports predictive rendering at SIGGRAPH 2018

August 31st, 2018 | Innovation


Today, designers and manufacturers rely on computer graphics rendering to simulate the appearance of objects and materials, in a wide range of applications. They extensively use rendered images to virtually try and pre-select between different types of materials, from fabrics and plastics to paint finishes and metals.

The appearance of materials in the images rendered by the visualization algorithms must be accurate and thus predictive, to ensure the right design decision will be made right from the conceptual stage. Predictive rendering for metals, plastic, cloth, and fabrics is challenging as they all have their own irregularities and specific structures. The visualization must perfectly render the color, surface, shape, and arrangement of the material’s appearance,  taking into account how appearance varies with illumination and view. This is possible only through optical simulation means, which can help determine crucial data, like the shape and quality of specular highlights depending on a material.


Want to learn more? Time to catch up on the talk given by ANSYS OPTIS at the Nvidia booth during SIGGRAPH 2018, and to discover more about how optical simulation is the key predictive rendering!


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After presenting how optical simulation has made its way to predictive rendering, Mathieu Reigneau, Product Owner on the Visual Experience solutions at ANSYS OPTIS, discusses the precision needed in every aspect of simulation to reach a true to life rendering quality: accurate enough not just to anticipate the beauty of the product, but more importantly to track down its slightest flaws before the product even exists.


He also discusses the gap between realistic and accurate, and defines, with practical examples, how predictive simulation can be achieved and compared to reality.


He finally explains how GPU acceleration is a real game-changer in the process of imagining, designing and experiencing a product, making it easy to test more possibilities and more complex materials and to rely on decisions made over accurate rendering throughout the whole creation process. The SPEOS technology, based on optical simulation, is not a mere rendering software, but an accurate, predictive simulation software, and the only able to create perfectly accurate virtual prototypes, which allow to make decisions and anticipate the final aspect of a product at any stage of its creation.

About the speaker

Mathieu Reigneau is the Product Owner on the Visual Experience solutions at ANSYS OPTIS. Mathieu holds an engineer’s degree in Lasers and Optics in France and a master’s degree in Photonics from St Andrews University (UK). Mathieu has been working with ST Microelectronics for a year, where he filled seven patents granted. He then joined OPTIS 8 years ago, as consulting engineer, and has successfully lead high-end photometry and visual ergonomics projects, mostly involved in proving simulations true against real prototypes. Fond of new technologies, he evolved toward being an expert in real-time photometric simulation, real-time rendering and virtual reality, on both hardware and software solutions, before taking on his new position.

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