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Sky is a retractable set of functions from Render's light panel.

Uniform lighting

Enables a distinctive sky menu, with:

Interface 0.99.5 render light-uniform lighting
Uniform lighting setting


Atmospheric scattering

Enables a distinctive sky menu, with:

"Abbot: Rayleigh stand for Rayleigh diffusion (light diffusion through the atmosphere that's why the sun appears yellow on earth and "white" in space). Decreasing rayleigh diffusion allows you to go closer to the horizon without getting the orange tone of dusk/dawn. For example, with a green sky you'll have pink dawn/dusk; check the opposite colors on this color wheel:"

Abbot-CYM color wheel
  • a Mie[3]
    • phase setting from 0.50 to 0.99
    • density scale from 0 to 100
    • color box
  • an Ozone[4]
    • density scale from 0 to 100
    • color box

Interface 0.99.5 render light-atmospheric scattering



Atmospheric scattering setting


Image based lighting

Enables a distinctive sky menu, with:

  • intensity scale from 0 to 200
  • image rotation scale from 0 to 360
  • the ability to choose which HDR image to use as scene lighting
Interface 0.99.5 render light-image based lighting
Image based lighting setting



  1. Thanks for the discovery Octtree!
  2. Rayleigh distribution on Wikipedia
  3. Mie scattering on Wikipedia
  4. Ozone attenuation scene impact by Ephtracy on Twitter



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