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Physically Based Rendering by Gege
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Physically Based Rendering by Gege

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Published in: Design, Technology, Art & Photos
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  • 1. @agatestudio Physically Based Rendering Gege Knight Agate Studio
  • 2. @agatestudio PBRAgate Studio 2014
  • 3. @agatestudio Physically Based Rendering • New method in producing 3D art • Based on a more realistic reasoning theory • We will discuss: – Basic theory – Marmoset Toolbag Demo – dDo workflow (if time permits)
  • 4. @agatestudio PBR IN THEORY
  • 5. @agatestudio Diffusion and Reflection • Usually known as “diffuse” and “specular” light.
  • 6. @agatestudio Diffusion and Reflection
  • 7. @agatestudio 3 Diffuse Phenomenon Diffuse Translucent Transparent
  • 8. @agatestudio Energy Conservation • Light leaving a surface can not be brighter than the lights that fell upon it.
  • 9. @agatestudio Metal VS Insulator • Metals are more reflective than insulators – Metal: 60-90% – Insulator: 0-20% • Metal tints reflected color • Metal absorbs lights that penetrates
  • 10. @agatestudio Fresnel • All smooth object will reflect perfectly on grazing angles.
  • 11. @agatestudio Microsurface • Irregularity of object surface • Finer than 1 pixel, can not be described using normal map (sanely)
  • 12. @agatestudio Energy Conservation • Rough surface = dim and spread reflection
  • 13. @agatestudio Microsurface • Gloss directly affects the brightness of reflections
  • 14. @agatestudio PBR IN PRACTICE
  • 15. @agatestudio Energy Conservation
  • 16. @agatestudio Albedo
  • 17. @agatestudio Microsurface / Smoothness / Gloss
  • 18. @agatestudio Reflectivity • 3 different workflow: – Specular map – Metal map – IOR
  • 19. @agatestudio Fresnel • Can not be controlled, but you should know what to expect
  • 20. Thank You! ( Demo and FAQ while we’re on break! )

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