DayNight with a skybox?

[blueapples]

Any one figured out how to get shadmar's DayNight script to work with a skybox or otherwise change the blue sky color?

[martyj]

You have to use a sphere with his shader as the skybox.

[blueapples]

Doesn't the script replace the material in that object? I want to make sure the day night changes actually still work but swap out my own art for the day and night parts.

[martyj]

From my understanding, it works off of math calculations. Not by having an image rotate.

 

To change the color of the sky, you'd have to change the math behind it.

 

Look at daynight.shader.

 

Shadmar was very kind to comment it nicely.

[blueapples]

Yeah I looked in there and there are basically no references to how to modify the color or distribution of stars, etc. There are a lot of equations but basically no explanation of what they do... Maybe you are looking at a different version?

[martyj]

To get the color of the sky, they calculate what an atmosphere does to light of the sun color.

 

See totalMie function in the shader.

 

I believe this is the paper Shadmar built this shader upon.

 

http://developer.amd.com/wordpress/media/2012/10/GDC_02_HoffmanPreetham.pdf

 

There's a comment on line 485 in the shader relating to star position.

 

"//stars" Although the original source is no longer found at the link "http://glsl.heroku.com/e#18186.0"