The document describes a rendering competition entry that simulates auroras. It calculates the aurora shape based on observed field aligned current data. It then calculates the energy levels at different points in the aurora curtain based on previous GPU volume rendering research. Finally, it renders the auroras using volume rendering and models the emission colors based on altitude levels and prior simulation research.

1. Realistic Image Synthesis
Rendering Competition
“Rendering Aurora”
2015/7/14

2. 2015/7/14
Rendering Result

3. 2015/7/14
Rendering Result

4. 2015/7/14
Technical Point
I have implemented “aurora simulation”
Calculate aurora shape
Calculate energy of each point in auroral curtain
Render aurora (Volume Rendering)

5. 2015/7/14
Technical Point
Calculate aurora shape
Modeling of Aurora Borealis Using the Observed Data(Tomokazu et al, 2011)
Field Aligned Current

6. 2015/7/14
Technical Point
Calculate aurora shape
Modeling of Aurora Borealis Using the Observed Data(Tomokazu et al, 2011)
Observed FAC and potential on auroral layer
(data from CCMC)
Calculate flow of current
Positive→particles fall down

7. 2015/7/14
Technical Point
Calculate energy of each point in auroral curtain
Interactive Volume Rendering Aurora on GPU(Orion et al, 2010)

8. 2015/7/14
Technical Point
Calculate energy of each point in auroral curtain
Interactive Volume Rendering Aurora on GPU(Orion et al, 2010)

9. 2015/7/14
Technical Point
Render aurora (Volume Rendering)
Add emission of aurora energy step by step(from lecture)
Distance Field method accelerates rendering[not implemented]
Emission color→ 557.7nm(green) around 100 km altitude
630.0nm(red) in higher altitude
(from “Simulating the Aurora Borealis” Baranoski, 2000)

10. 2015/7/14
Technical Point
Render aurora (Volume Rendering)
Add intersection Auroral Layer and Atmosphere as volume
Considering atmosphere to lose light of aurora is better[not implemented]