12. Create another layer, this time setting the blending mode to Overlay. Use another, stronger stone texture, and apply it again to various parts of the face. You can delete some of the texture as well, using custom brushes to create a more believable effect. To push texturing further, create one final layer and set it to ‘normal’. Apply textures here using custom brushes.
13. The image is coming along well, but the colours are a bit oversaturated and warm. For a quick fix, use Photoshop’s Color Balance tool (Image > Adjustments > Color Balance) to apply some warmer shades. Lower the opacity of the ‘Textures’ folder to around 75 per cent, as the textures were somewhat harsh before.
14. The image is pretty much finished now, but there are one or two final colour changes we can make. The problem is that stone and rocky materials don’t really pick up many colours, and often look desaturated. With that in mind, lower the saturation of the whole image to create a more believable effect. When you’re happy with the result of this process, you’re done. If you’ve been working using Patsouras’s example, why not try a self-portrait next, or perhaps a group shot?
As with any human representation, the eyes are very important for giving your stone portrait realism. Use dramatic shadows to make the eyes look interesting but not too human – a stone statue ought to have stony eyes, after all.
Who: CG Addict, computer artist George Patsouras is based in Long Island, US. His work ranges from photorealistic fantasy illustrations to caricature projects; he has won a number of awards. he’s currently working as a freelance illustrator for a range of publications, and is also doing personal commissions.
Software: Adobe Photoshop
Time to complete: 4-10 hours