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Lagoa’s very own Kai Schröder and Arno Zinke have recently published a position paper comparing different material representations for interactive appearance design in the context of visual prototyping.

In this paper, Schröder and Zinke explain the desirability of being able to visualize your design in a realistic way while interactively rendering:

“In the context of design, we are not only interested in the quality of material depiction in final beauty shots of a product, but also during the interactive creation process. Using cloud-based services such as Lagoa, people can nowadays collaborate on designs, change material properties and tweak lighting setups without even being in the same office or city.”

An effective material representation must therefore provide physically plausible results not only for the final render, but also dynamically while editing and rendering progressively in real-time.  Schröder and Zinke propose five key goals for a material representation and rendering system:

  1. Should allow for predictive rendering;
  2. Can provide high-quality interactive feedback;
  3. Should allow for generic material descriptions;
  4. Should be dynamic and flexible, allowing for intuitive variations of a material;
  5. Should allow for decoupling of micro-geometry and optical properties.

They stress the importance of using explicit or statistical micro-geometry representations of a material, decoupled from its optical properties, in order to achieve physically plausible results while editing and rendering interactively:

“Decoupling of small-scale geometric structure and optical properties allows for the most comprehensive edits while still achieving physically plausible results, even for optically complex materials such as cloth.”

CLICK HERE to download the full paper.

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