Atmosphere Simulation

Post your tests, experiments and unfinished renderings here.
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Joined: Sat Mar 31, 2018 11:17 am

Re: Atmosphere Simulation

Post by Fox » Thu Mar 12, 2020 3:11 am

With latest numerical precision fixes, the BiDir can render large scenes.
3h on e5 2620 v4
I used the "Glare_Layer_vol" for camera vol.

And the hetero volume type with multi / max steps 80 for all.

The step sizes are insane, from the direction of Sun, between Atmosphere_3 and Atmosphere_2, there is close to 600km.
So i divided it by 30 and get 19503.3m, same with others:
Atmosphere_1_vol step size 4926.7
Atmosphere_2_vol step size 10230.0
Atmosphere_3_vol step size 19503.3
Glare_Layer_vol step size 4243.3

Smooth shading seems to not work with that insane scale for Moon, i use shade flat and upped the geometry.

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Joined: Tue Apr 24, 2018 7:20 pm

Re: Atmosphere Simulation

Post by wasd » Thu Mar 12, 2020 10:29 am

Moon lighting is not realistic there, because there's (almost) no reflection from earth.
I made the earth to be a complete sphere.
moon2.png (11.06 KiB) Viewed 250 times
Albedo for earth and moon:
emalb.png (3.6 KiB) Viewed 250 times
CPU Bidir (sometimes GPU Path) + Metropolis | Log Power | Core i5-4570

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Joined: Fri Mar 09, 2018 1:46 pm

Re: Atmosphere Simulation

Post by frank_yifei » Thu Mar 12, 2020 2:23 pm

the blue sky is amazing

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Joined: Fri Jul 06, 2018 8:35 pm

Re: Atmosphere Simulation

Post by Glendaloch » Thu Mar 12, 2020 6:46 pm

Super interesting work here!

Yes that blue one has real depth, but also the sunrises (sets?) are great too.

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