In: Generators/Noises



Generates projected caustics based on a height map and a light direction.Comes in both Grayscale and color versions, differences are subtle but the color version adds color dispersioneffects. Light is cast from a single point, no Environment map is used.


  • Output Color Space: Raw, sRGB
    Set output color space.
  • Photon Grid Size: Auto, 512, 1024, 2048, 4096
    Sets quality by adjusting grid size, but defaults to matching input. Can be used to speed up calculation.
  • Surface Height Scale: 0.0 - 1.0
    Multiplier to determine how the height is interpreted.
  • Surface Height Position: 0.0 - 1.0
    Set distance of refracting surface to projection.
  • Surface IOR: 1.0 - 2.0
    Set refraction index, in the color version this adds more color dispersion.
  • Photon Size: 1.0 - 50.0
    Photon size affects crispness of the effect.
  • Dispersion: 0.0 - 0.01 (Color version only)
    Affect just the color dispersion. Not visible when IOR is low.
  • Jittering: 0.0 - 1.0
    Add irregular jittering to the cast photon particles.
  • Light Position:
    Moves the light position. Also done through a gizmo in the 2D view.
  • Background Color: (Color value) (Color version only)
    Change the background color. Limited to black in the grayscale version.
  • Non Square Expansion: False/True
    Enable compensation of squash and stretch with non-square ratios.

Example Images