Pixel clamping can be useful in scenes that contain 'spike noise' or 'fireflies': isolated, super bright pixels that jump around from frame to frame.


Sample (Firefly Filtering)


The filter type used for averaging individual subpixel samples into a final pixel color. Most of these filters are available for legacy purposes only. The complete list of filters is:



 We recommend using the Gaussian (width 2.0) or Blackman-Harris filters.




Clamping (Firefly Filtering)

Clamp AA samples

Enable/Disable clamping.

AA Max Value  

Affect AOVs

Indirect Max Value