Usually rocks aren't smooth ... So, we'll add few details and textures to it! I use a rough spattered brush, with the opacity set to 10-20%. Feel free to improvise at this point.
Step 8:
We are now done with drawing of the rock! All we have to do now is to colour it. Make a new layer beneath the "outline" layer and name it "colour". Set the "outline" layer's blending mode to "multiply". That way the dark areas of this layer effect the bottom ones, but you can still see the true color of the layers beneath. Choose a shade for your rock (for this one I use blue-gray) and color the rock on "color" layer with the brush.
Step 9:
Now all we have to do is add some gloss to the brighter areas for highlights. I use a dodge tool for this task.
Step 10:
We are finished now! Well at least with the rock part of this picture. Remember ... rocks usually have a rough texture, but their shape could be anything ... from rounded to squared or even flat... nature itself has the greatest imagination. With this technique you can reproduce all of them!
