Over the last few months I have been trying to push my understanding of Physically Based Shading, by actively exploring every corner and turning over every stone, to uncover any area where I lack knowledge. Although this is still an ongoing process and I still have a lot to do, I thought I could already share some of what I have learned in the process.<\/p>\n\n\n\n
Last weekend the Easter demoparty event Revision<\/a> took place, as an online version due to the current pandemic situation. There, I presented a talk on Physically Based Shading, in which I went into electromagnetism, existing models, and an brief overview of a prototype I am working on.<\/p>\n\n\n\n The presentation goes into a lot of detail about interaction of light with matter from a physics point of view, then builds its way up to the Cook-Torrance specular BRDF model. The diffuse BRDF and the Image Based Lighting were skipped due to time constraints. I am considering doing a Part 2 to address those topics, but I haven’t decided anything yet.<\/p>\n\n\n\n In the mean time, please leave a comment or contact me if you notice any mistake or inaccuracy.<\/p>\n\n\n How do you implement a Physically Based Shading for your demos yet keep the possibility to try something completely different without having to rewrite everything? Here are the slides, together with the text of the talk and the link to the references: And finally here is the recording of the talk, including a quick demonstration of the prototype:Abstract<\/h2>\n
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In this talk we will first get an intuitive understanding of what makes matter look the way it looks, with as much detail as we can given the time we have. We will then see how this is modeled by a BRDF (Bidirectional Reflectance Distribution Function) and review some of the available models.
We will also see what makes it challenging for design and for real-time implementation. Finally we will discuss a possible implementation that allows to experiment with different models, can work in a variety of cases, and remains compatible with size coding constraints.<\/p>\n<\/blockquote>\nSlides<\/h2>\n
Implementing a Physically Based Shading model without locking yourself in<\/a><\/strong>.<\/p>\nVideo<\/h2>\n