Nodes · Filter

BS_FireflyKill

Filterv1coreForge

Overview

Removes path-tracer fireflies — single pixels that won the sampling lottery and landed orders of magnitude too bright. Statistical, not a blur: a pixel is replaced only when it is wildly brighter than the median of its neighbours, and the fix keeps its hue so you don't get a grey dot.

How to

How-to

Wire the path-traced render; threshold is how much brighter than its neighbours a pixel must be to count as a firefly.
size is the neighbourhood, strength how fully it is replaced.
Put it before any blur or glow, which would spread the sparks.

Inputs

Input	What it takes
in	the image this node works on

Outputs

Output	Type
out	Image

Parameters

Parameter	Type	Default	What it does
threshold	Float	4.0	The level the effect starts at.
size	Float	2.0	The effect's size/radius in pixels.
strength	Float	1.0	How aggressively isolated hot pixels are removed: 0 is off, 1 kills every one-pixel spike brighter than its neighbours, 0.5 dims them.
disabled	Bool	false	Bypass: the node passes its first input through untouched (D in the graph). The knobs keep their values for when it comes back.
label	Text		A note shown under the node in the graph — what this node is FOR. Never affects the render or the cache.
hide_input	Bool	false	Draw the node without its input wire — a tidy graph for a node whose source is obvious (a Dot, a viewer tap).