Sure.

I use GIMP

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First I get a layer of embossed rams on a 50% grey background. To emboss rams you begin with the image, then use the standard 'emboss' filter that automatically comes with GIMP or photoshop. Make sure to set the background at exactly 50% grey.

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Next set this layer to Hard Light, and c. 55% opacity.

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Then get a layer of random noise or plasma. Here I've blacked out the bits I don't want the rams to show.

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Then use that as a Layer Mask on the ram layer. This makes the white bits totally visible and the black bits invisible, giving a nice worn appearance.

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Next up the larger carving. Again an embossed image on 50% grey.

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This is set to Hard Light opacity 70%

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