It sounds like you might be referring to one of these:
Traditional frequency separation bogs down large files (300MB+). Fx Ray optimizes the math behind the separation, ensuring that even 8K resolution files remain responsive. The script runs locally on your GPU via Photoshop’s engine, making adjustments instant. Fx Ray Frequency Separation Download
The plugin was developed by the retouching education platform (often associated with retoucher Artem Pylypenko). It sounds like you might be referring to
: Unlike standard actions, this tool allows for precise control over the blur radius, ensuring that fine textures like pores are isolated from underlying skin tones. Static Radius: You often guess the blur radius
: Sites like Noble Desktop often host copies of the .atn action file for students, including versions compatible with both newer CC and older CS5/CS6 versions of Photoshop. How to Install and Use How to use frequency separation in Photoshop - Adobe
: Avoid the "plastic" look by smoothing skin tones on the color layer without affecting the natural skin grain on the texture layer. Time Efficiency