-First, create a new image with a dark colored background. Use this color as a basis for your overall color scheme. For this example, I'm using a dark navy blue.
-Create a new layer, and on this new layer make a selection and give it a solid color fill of a similar, lighter color.
-Right click the new layer in the layers list and select 'blending options'. On this menu, select 'stroke' and give it a width of 8. Pick a lighter or darker border color, I'm going with lighter. You should now have something like this:
-With the selection still active, create a new layer on top of this one. Set the mode of the layer to 'Multiply'.
-Open another image to use as a texture, preferably black and white, to fill into the selection. In this instance I'm using an old sandstone texture. Be sure the texture image is larger than the selection you're pasting it into. Select all and then copy or cut.
-In the main project, on the newly created multiply layer, select 'paste into'. You should now see the latent image of the texture appear within the selection:
-Right click on the solid color fill layer's stroke effect, and select 'Create layer'. This turns the stroke effect into it's own indepedant layer. Now merge the above solid color fill layer with the stroke layer below.
-On this new combined layer, select 'blending options' again and choose 'stroke' once more. Set a thinner width this time and choose an even brighter color:
-Also under blending options on this layer, select 'outer glow'. Use a very bright color. Set the spread to ~20% and the size to 50-60 pixels:
-Also set the noise to something low like 4%. I love to use noise in compositions because it serves as a sort of canvas for the color. It's a lot more interesting to look at than perfectly smooth gradients. The finished product should look something like this:
Optional finishing touch:
This technique can be used to create a sort of dull metal effect to finish off the overall look.
-Use the magic wand on the solid fill layer to get the original selection back. Create a new layer on top of everything and set it to 'multiply'. Fill the selection with solid white and then select 'add noise'. Add about 35% monochromatic noise and hit apply.
-Keeping the selection, select 'motion blur' and blur the noise diagonally at a distance of about 45 pixels. You now have this:
