Don't anybody panic or run for the doors. I'm NOT expecting THIS LEVEL of detail in your how-to-detail.
I was on a roll and decided to unload the while 9-yards.
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This was a fun image to work with, Bill.
Here are the key points to my interpretation. The following post contains a snapshot of the Layers Palette.
First, I enlarged the image to about 12" wide. I find I get better results working with larger images than smaller ones.
Notes…
Layer B: Posterize adjustment layer
This can be a fun one with which to experiment. The advantage (like all adjustment layers) is the ability to “change your mind” after the fact. Remember: The fewer the levels specified, the more “simplified” (color-wise) the image becomes. Since layer A was a desaturated version of the Background, layer B rendered black, white and shades of gray.
Layer C: Find Edges
Nothing magical here and no specific reason why I chose Color Dodge and 65%. It just “looked good.” Experiment with blend modes and opacities.
Layer D: Levels (grouped)
That’s grouped, not groped.

Notice that I painted black on the layer mask to suppress the effect on the middle section of the image.
When you group a layer, it only affects the one(s) below it, in this case layer C. Applying a Levels adjustment layer to a Find Edges layer allows one to control line characteristics, e.g., thickness, density, presence or absence. Experiment with the sliders to see what I mean. As you experiment with D note layers A and B are not affected.
Layer E: Background to which the Dry Brush and Ocean Ripples were applied.
I’ve found this combination of filters renders a rough, brush-like result. I wanted to apply this to the water, but not the rest of the image. Using a layer mask (Layer > Add Layer Mask > Hide All) allowed me to isolate the effect. When “Hide All” is selected, the layer mask is filled with black, completely hiding layer E from view. Painting the water area with white revealed the “brushy water” in Layer E.
Could I have just clicked the “Add layer mask” button at the bottom of the Layers Palette to add E’s layer mask? Sure. This is the functional equivalent of Layer > Add Layer Mask > Reveal All. The downside would have been having to paint all that black to hide the non-water areas of layer E. Just call me lazy.
Layer F: Copy of Background set to Overlay
After turning down the opacity this layer brought back some subtle colors which I wanted, but almost negated the results of the carefully crafted layer E and it’s layer mask below. Not good.
Option A: Create a layer mask for this layer and paint black where I didn’t want the Overlay blend to take effect. Not terribly difficult, but here’s a faster, more accurate way.
Option B: Copy E’s layer mask, paste it into F’s layer mask and invert it.
* Create a new layer mask for F (Layer > Add Layer Mask > Reveal All)
* While holding down the Alt key, click on E’s layer mask icon, filling the screen with E’s layer mask.
* Ctrl + A (to select the layer mask)
* Ctrl + C (to copy it)
* Click F’s layer mask icon in the Layers Palette
* Ctrl + V (to populate F’s layer mask)
* Ctrl + I (to invert it)
(almost) Instant F layer mask that’s exactly the opposite of E’s layer mask.
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In summary there are many ways to blend layers and effects. This is just one of countless combinations.
While I’m not expecting everyone to like this particular combination (fact is I'm not 100% crazy about it myself), it does illustrate different methods to combine layers regardless of what the contain.
Cheers...
~Danny~