[ProceduralSkyMaterial] provides a way to create an effective background quickly by defining procedural parameters for the sun, the sky and the ground. The sky and ground are defined by a main color, a color at the horizon, and an easing curve to interpolate between them. Suns are described by a position in the sky, a color, and a max angle from the sun at which the easing curve ends. The max angle therefore defines the size of the sun in the sky.
[ProceduralSkyMaterial] supports up to 4 suns, using the color, and energy, direction, and angular distance of the first four [DirectionalLight3D] nodes in the scene. This means that the suns are defined individually by the properties of their corresponding [DirectionalLight3D]s and globally by [member sun_angle_max] and [member sun_curve].
[ProceduralSkyMaterial] uses a lightweight shader to draw the sky and is therefore suited for real-time updates. This makes it a great option for a sky that is simple and computationally cheap, but unrealistic. If you need a more realistic procedural option, use [PhysicalSkyMaterial].
The sky cover texture to use. This texture must use an equirectangular projection (similar to [PanoramaSkyMaterial]). The texture's colors will be [i]added[/i] to the existing sky color, and will be multiplied by [member sky_energy_multiplier] and [member sky_cover_modulate]. This is mainly suited to displaying stars at night, but it can also be used to display clouds at day or night (with a non-physically-accurate look).
The tint to apply to the [member sky_cover] texture. This can be used to change the sky cover's colors or opacity independently of the sky energy, which is useful for day/night or weather transitions. Only effective if a texture is defined in [member sky_cover].
If [code]true[/code], enables debanding. Debanding adds a small amount of noise which helps reduce banding that appears from the smooth changes in color in the sky.
