Physical Sun/Sky


Physical Sun/Sky

In: 3D View/HDRI Tools

Intermediate

Description

Physical Sun and Sky implementation based on Hosek-Wikie skylight model. Provides an excellent base for an artifical HDRI.

Parameters

  • Sun Position:
    range = [0,1]x[0,1] (longitude-latitude angles)
  • Turbidity: 1.0 - 10.0
    Turbidity ranges from 1 to 10
  • Albedo: 0.0 - 1.0
    Albedo ranges from 0 to 1.
  • Ground Color: (Color value)
    Color of the ground plane.
  • Exposure (EV): -1.0 - 4.0
    Exposure value of resulting output.
  • Sun Size: 0.0 - 4.0
    Scale of the Sun, any value different than 1 is non physically correct. Value has subtle effects!
  • Sun Intensity: 0.0 - 1.0
    Intensity of sun disc. Sun disc is fairly small so effect is not immediately visible.
  • Sky Intensity: 0.0 - 1.0
    Intensity of the sky. Also affects flaring of sun in the sky, not the disc itself.

Example Images