Sky rendering

Korender supports several ways to render sky. Declare them inside a Frame using the Sky function:

Sky(material: SkyMaterial)

Cubemap sky

Provide 6 textures to construct a skybox cube map:

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

Alternatively, create a cube texture from Image objects via cubeTexture(id, images).

Single-texture sky

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

Frame {
    Sky(textureSky(texture("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 (returns SkyMaterial):

Parameter	Type	Default	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	ColorRGB	ColorRGB(0x3F6FC3)	Sky color at zenith
horizonColor	ColorRGB	ColorRGB(0xB8CAE9)	Sky color at horizon
cloudLight	Float	1.0f	Max lightness of clouds
cloudDark	Float	0.7f	Min lightness of clouds
block	MaterialScope.() -> Unit	{}	Optional material customization

starrySky

Procedural night sky with colorful stars (returns SkyMaterial):

Parameter	Type	Default	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
block	MaterialScope.() -> Unit	{}	Optional material customization