This contains a simple atmosphere shader usable on planets. I developped this for a tech demo I'm working on, so I thought of making it an addon.
- Not realistic, but fast (no nested for loops)
- Gradients of two colors for each side of the planet
- Can be seen from inside like regular fog if you want to land on the planet
- Switches to a cube mesh when seen from far away so multiple atmospheres can be drawn at lower cost
I'm interested in having a realistic version of the shader but it's not a priority at the moment.
Copy the contents of zylann.atmosphere under the res://addons folder of your project. There is no need to activate a plugin.
Drag and drop planet_atmosphere.tscn as child of your planet node. In the inspector, give it the same radius, and choose a height. You can tweak colors by expanding the shader_params category. Depending on the size of your planet, you may also have to tune density since light will have to travel larger distances through it.