This is just a quick tutorial to show you how to create a metallic, rocky texture in Photoshop. It can be adjusted to create a crumpled foil texture or anything similar – I’ve used smart filters in the tutorial below so the degree of rockiness can be adjusted to suit your design.
Here we go…
Open a new document. Mine is 1000px by 1000px at 72 ppi resolution.
Right click on the background layer in the layer panel and convert it to a smart object. This will allow you to adjust all the filters we apply later to suit your taste.
Set your foreground and background colours to the default black and white (press D to set this).
Run the cloud filter (Filter > Render > Clouds). Press ctrl + F for PC or cmd + F for Mac to rerun the filter if you don’t like the result you initially got.
Now go to Filter > Sketch > Bas Relief. I cranked the detail up to 15, set the smoothness to 2 and set the light to come in from the top left. If your document is a different size then adjust the smoothness until you get nice sharp edges.