Anyone have a good process for turning a photo into an npc portrait?

[Awachi]

Looking more for applying a few filters for quick-and-dirty, rather than a full exhibition of genuine artistry.

[cdx]

I tend to look for portraits with good range of values (lighter and darker areas), use photoshop CS6 to increase the contrast, optionally adjust the levels for better range of values, increase vibrance a lot for bg1 painterly feel, maybe slightly increase saturation. If there is too much detail in the background I quickly blur it or paint over it with a big brush to decrease visual noise (not more than minute or two).

I often play the non-EE games with resolution upscaled rather than with resolution mods. Scaled up from 800x600 with the above done, the portraits have pretty much idetical style as bg1 portraits.