The edge of the metal is a bit boring. Now we need to give the edge of the jagged metal some shading.
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Create a new layer and name it "Dark Edge Shading".
Create a new layer and name it "Light Edge Shading".
Now we need to make a selection of the edge. Hit Cmd/Cntrl and click on the "Edge Color" layer-layers mask, if you see the marching ants on the outside of the canvas, hit Cmd/Cntrl + I to invert the selection.
Then hit Shift + Cmd/Cntrl and click on the "Metal Texture copy" layer-layers panel, if you see the marching ants on the outside of the canvas, hit Cmd/Cntrl + I to invert the selection.
This should create a selection that looks like this without marching ants on the outside of the canvas……
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Save this selection by going to SELECT > SAVE SELECTION.
Highlight "Dark Edge Shading" layer.
Grab your Brush Tool.
Make your brush fairly soft and lower it's Flow to about 70%.
Set to a dark color of choice.
Begin Brushing in the the dark shaded areas.
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Highlight "Light Edge Shading" layer.
Set to a lighter color of choice.
Begin Brushing in the the light shaded areas.
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This is the basic jagged hole effect.