Denoising

Brightness Clamp

Brightness Clamp - Defines the maximum brightness at the hit point. Lower values improve denoising stability by reducing boiling, fireflies, and other artifacts, but at the cost of the final brightness of the effect.

• Automatic - Statistically evaluates the full frame and adjusts the maximum brightness dynamically, based on how many lit pixels are visible and how bright they are. Max Deviation can be used to bias the evaluation toward higher brightness input.

• Manual - Sets the maximum brightness threshold directly via the Max Value parameter.

Performance impact: Automatic - small, Manual - none

As a reference, HDRP’s native SSGI has a hardcoded clamp value of 7. Given the differences in implementation, this is roughly equivalent to a value of ~9 in HTrace SSGI’s manual clamping.