Frequency Separation

Using the high-pass method (vs. image-apply):

1. Create two duplicate layers ("texture" on top and "tone" next)
2. With regards to the texture layer
1. Apply a high-pass filter using a pixel radius to capture all fine details but not tonal or volume changes
2. Blending mode to Linear Light
3. Opacity to 50%
3. Gaussian blur the tone layer with the same pixel radius used for the high-pass filter