lensflare.md

LensFlare

LensFlare {
  SFFloat transparency      0.4    # [0, 1]
  SFFloat scale             1.5    # (-inf, inf)
  SFFloat bias             -0.9    # (-inf, inf)
  SFFloat dispersal         0.6    # (-inf, inf)
  SFInt32 samples           4      # [0, inf)
  SFFloat haloWidth         0.4    # [0, inf)
  SFFloat chromaDistortion  2.0    # (-inf, inf)
  SFInt32 blurIterations    2      # [0, inf)
}

Description

%figure "Lens flare effect"

%end

The LensFlare node can be added in the lensFlare field of any Camera or Viewpoint to simulate lens flares. The lens flare effect is due to the light being scattered in lens systems through generally unwanted image formation mechanisms, such as internal reflections and scattering from material inhomogeneities in the lens. To simulate a lens flare, a post-processing shader that generates ghosts and halos is applied to the render, which can be tweaked with the parameters to achieve the desired effect.

Field Summary

• The transparency field specifies the blending between the lens flare and the corresponding render (viewpoint or camera).

• The scale field specifies the strength of the lens flare.

• The bias field specifies the intensity threshold for lens flare features generation.

• The dispersal field specifies the dispersal of the ghost samples.

• The samples field specifies how many samples are taken to generate the ghosts.

• The haloWidth field specifies the lens flare halo width.

• The chromaDistortion field specifies the amount of chromatic distortion induced by the lens.

• The blurIterations field specifies the amount of blur that is applied to the lens flare.