HELP getting this exact effect with photoshop

[kreen81]

I have been trying to reproduce this effect on another picture for the past 3 days but I cant seem to achieve the smoothness of the shadows. The picture I have is colored and High resolution enoough but the final result seems to be grainy and pixelated. I ve tried using the pop art tutorial, threshold, cutout tool, playing with levels and posterizing it but nothing works. Any suggestion or tutorial would be really appreciated!:sad:

 

[Paul]

Layers in desaturated then recoloured to create new versions, overlayed then remove differing layers portions to achieve desired outcome i think. Slightly blurred layers and then apply to a textured background.

 

[sprucemagoo1]

Use the cut-out filter.

 

[agentmoeller]

Threshold.

 

[sprucemagoo1]

There are a few other filters that create almost the same effect.