Sky rendering

Korender supports several ways to render sky:

Cubemap sky

Provide 6 textures to construct a skybox cube map:

Frame {
    Sky(cubeSky(cubeTexture("sky", mapOf(
        NX to "textures/skybox-nx.jpg",
        NY to "textures/skybox-ny.jpg",
        NZ to "textures/skybox-nz.jpg",
        PX to "textures/skybox-px.jpg",
        PY to "textures/skybox-py.jpg",
        PZ to "textures/skybox-pz.jpg"
    ))))

Single-texture sky

Supply a single texture that will be projected onto the sky dome, accounting for projection distortion

Frame {
    Sky(textureSky("textures/sky.jpg"))

Procedural sky

Choose from several predefined parameterized procedural sky presets:

Frame {
    Sky(fastCloudSky(thickness = 12.0f, rippleAmount = 0.4f))

Presets:

fastCloudSky

Procedural day sky with clouds, supported parameters:

Uniform name	Type	Default value	Description
density	Float	3.0f	Cloud density, 1-5
thickness	Float	10.0f	Cloud thickness, 0-20
scale	Float	1.0f	Cloud scale, 0.1-10
rippleAmount	Float	0.3f	Cloud high-frequency ripple amount, 0-1
rippleScale	Float	4.0f	Cloud ripple frequency multiplier, 1-10
zenithColor	Color	Color(0x3F6FC3)	Sky color at zenith
horizonColor	Color	Color(0xB8CAE9)	Sky color at horizon
cloudLight	Float	1.0f	Max lightness of clouds
cloudDark	Float	0.7f	Min lightness of clouds

starrySky

Procedural night sky with colorful stars:

Uniform name	Type	Default value	Description
colorness	Float	0.8f	Star color intensity
density	Float	20.0f	Star density (amount)
speed	Float	1.0f	Star motion speed factor
size	Float	15.0f	Star radius factor