1struct Atmosphere {
2    ground_albedo: vec3<f32>,
3    /// Radius of the planet
4    /// Units: m
5    inner_radius: f32,
6    /// Radius at which we consider the atmosphere to 'end' for out calculations (from center of planet)
7    /// Units: m
8    outer_radius: f32,
9    /// Transform from world space to atmosphere space, inverse of the atmosphere entity's transform
10    world_to_atmosphere: mat4x4<f32>,
11}
12
13struct AtmosphereSettings {
14    transmittance_lut_size: vec2<u32>,
15    multiscattering_lut_size: vec2<u32>,
16    sky_view_lut_size: vec2<u32>,
17    aerial_view_lut_size: vec3<u32>,
18    transmittance_lut_samples: u32,
19    multiscattering_lut_dirs: u32,
20    multiscattering_lut_samples: u32,
21    sky_view_lut_samples: u32,
22    aerial_view_lut_samples: u32,
23    aerial_view_lut_max_distance: f32,
24    sky_max_samples: u32,
25    rendering_method: u32,
26}
27
28/// "Atmosphere space" uses local up for the zenith so the horizon-detail
29/// parameterization concentrates texels at the viewer's horizon. Azimuth uses a
30/// world-fixed reference so the terminator stays stable when tilting the camera.
31struct AtmosphereTransforms {
32    world_from_atmosphere: mat4x4<f32>,
33    atmosphere_from_world: mat4x4<f32>,
34}