> Peter Collienne > 20.09.2013
Physically Based Rendering of the Martian
Atmosphere
www.DLR.de • Chart 1
Overview
- Dividing the Atmosphere
- Approximation of Light-Intensity
- From Earth to Mars
- Drawbacks & Conclusion
> Pete...
Dividing the Atmosphere
> Peter Collienne > 20.09.2013
Air
Gas molecules Particles (Aerosols)
(Dust, Water droplets)
(Rayl...
Bruneton‘s Approach
> Peter Collienne > 20.09.2013www.DLR.de • Chart 5
Rendering the Earth‘s Atmosphere
> Peter Collienne > 20.09.2013www.DLR.de • Chart 6
From Earth to Mars
> Peter Collienne > 20.09.2013www.DLR.de • Chart 7
The Martian Atmosphere
- Less dense than Earth‘s atmosphere
- Rayleigh Scattering has close
to no impact
- Iron oxide dust...
Adjusting Parameters
> Peter Collienne > 20.09.2013www.DLR.de • Chart 9
http://www.jpl.nasa.gov/images/msl/20130315/pia16769.jpg
Parameter Estimation through Comparison
> Peter Collienne > 20.09...
Parameter Estimation through Comparison
> Peter Collienne > 20.09.2013www.DLR.de • Chart 11
Drawbacks
> Peter Collienne > 20.09.2013
- Rendering the atmosphere costs about 10% of framerates
- Artifacts can appear o...
Conclusion
- Interactive visualization of the
martian atmosphere
- Using a set of parameters derived
from a physical appro...
> Peter Collienne > 20.09.2013www.DLR.de • Chart 14
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Physically Based Rendering of the Martian Atmosphere

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Physically Based Rendering of the Martian Atmosphere

  1. 1. > Peter Collienne > 20.09.2013 Physically Based Rendering of the Martian Atmosphere www.DLR.de • Chart 1
  2. 2. Overview - Dividing the Atmosphere - Approximation of Light-Intensity - From Earth to Mars - Drawbacks & Conclusion > Peter Collienne > 20.09.2013www.DLR.de • Chart 2
  3. 3. Dividing the Atmosphere > Peter Collienne > 20.09.2013 Air Gas molecules Particles (Aerosols) (Dust, Water droplets) (Rayleigh Scattering) (Mie Scattering) http://apod.nasa.gov/apod/image/1104/yuriearth_iss_3032.jpgv www.DLR.de • Chart 3
  4. 4. Bruneton‘s Approach > Peter Collienne > 20.09.2013www.DLR.de • Chart 5
  5. 5. Rendering the Earth‘s Atmosphere > Peter Collienne > 20.09.2013www.DLR.de • Chart 6
  6. 6. From Earth to Mars > Peter Collienne > 20.09.2013www.DLR.de • Chart 7
  7. 7. The Martian Atmosphere - Less dense than Earth‘s atmosphere - Rayleigh Scattering has close to no impact - Iron oxide dust is reason for color of the atmosphere - Mie Scattering doesn‘t account for colored particles > Peter Collienne > 20.09.2013 Adjust Parameters http://marsrovers.jpl.nasa.gov/gallery/press/spirit/20050610 a/sunset_a489_gamma_2sub_800.jpg www.DLR.de • Chart 8
  8. 8. Adjusting Parameters > Peter Collienne > 20.09.2013www.DLR.de • Chart 9
  9. 9. http://www.jpl.nasa.gov/images/msl/20130315/pia16769.jpg Parameter Estimation through Comparison > Peter Collienne > 20.09.2013www.DLR.de • Chart 10
  10. 10. Parameter Estimation through Comparison > Peter Collienne > 20.09.2013www.DLR.de • Chart 11
  11. 11. Drawbacks > Peter Collienne > 20.09.2013 - Rendering the atmosphere costs about 10% of framerates - Artifacts can appear over the horizon due to numerical instability - Correcting this using interpolation results in performance-loss - Shape of the planet is assumed to be a perfect sphere - Limited to constant density per radius - ‚Clear-Sky‘-Model is not the perfect approximation www.DLR.de • Chart 12
  12. 12. Conclusion - Interactive visualization of the martian atmosphere - Using a set of parameters derived from a physical approach and partially validated by available imagery. - Implemented as a plugin to work with arbitrary planetary rendering frameworks > Peter Collienne > 20.09.2013www.DLR.de • Chart 13
  13. 13. > Peter Collienne > 20.09.2013www.DLR.de • Chart 14

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