Rocky texture in Photoshop

[stevenhill]

Step 1

Open a new Photoshop documents with the 640 x 480 dimensions.
Then reset the palette by pressing the ‘D’ key.

Step 2

Select Filter > Render > Difference Clouds. Then repeat the filter again by selecting Ctrl + F and you should get the image.

Step 3

Select Filter > Stylize > Find edges and you should get the following effect.

Step 4

Select Image > Adjustment > Levels and drag the left most slider to the right until it looked alike.