Thanks everybody!
@Lancadore: There's no need for a tutorial. I just used the toolbox and the Diagonal Lines plugin. Use the Line / Curve tool with the Brush width set at 30-60 for the X.
[Added] 2 New realistic images:
Tell me what you think
Hey Thank you! I saw some cool wallpapers (example) on deviantart and I tought of making one. I just used a c4d (planetrenders.net) and some brushes and voila.