Step 7:

To the details then! You will have noticed from the image up above that I had painted in some cracks, most notably the one running up the flat face on the left. However the overall surface still looks flat and uninteresting and so needs far more fractures and undulations. I started by erasing parts of the original grey layer (part2) to create highlights exactly as before.

Knowing that the light is being cast from the top left I then traced a darker line to the left of these lines on the Dark areas layer where the shadows would reside. With the large shadow layer above all other layers it means that when erasing the grey it does not reveal a white anymore, see the image below.

Step 8:

In the picture below you will see that Ive added a lot more detail in the form of cracks and crevices as well as darkening the shadows around the top and bottom of the picture. The best approach is to be quite loose and free about the way you apply marks to begin with if they are wrong you can simply erase them (if you are erasing from a layer such as the grey one, just add in more grey to undo it).

There is no logical pattern or set of rules to follow here, just use your intuition and add detail where you see fit. This is when I use some of the initial marks made in stage 3 to suggest how and where to place the details. You can see when you compare this image with step 6 that there is now more clarity and definition and the whole image looks less sketchy.

Step 9:

The final phase of the tutorial involves improving the detail further and using a customised brush to add a subtle pattern across certain areas to break up the surface somewhat.

tarting with a default Dry brush I then opened up the brush presets and chose a suitable Dual brush and altered the Scattering settings until I ended up with a result similar to that shown below.

You could do this on separate layers if you wish and set the blending mode either to Soft light or Multiply depending on the area and desired effect it is up to you. You can see in the picture where I have applied the marks, numbered 1- 4. With a bit more work and a few tweaks I arrived at the final result as shown below.

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