How to use equalizer :?

Yes, it is possible to use the Equalize filter only on the height channel in Adobe 3D Substance Sampler. The Equalize filter adjusts local contrast based on a distance range and is generally useful as part of the Image to Material (B2M) workflow¹.

To apply the Equalize filter only to the height channel, you need to enable the “Override Per Channels” toggle. This allows you to control the filter for each channel independently¹. Once this is enabled, sections will appear for each channel¹.