Apply filter 01
After placing and masking the model as described in step 4, click the layer thumbnail. Go to Filter> Artistic> Cutout. The filter dialog will appear.
Configure Cutout 02
Recommended settings are: Number of Levels: 4, Edge Simplicity: 4, Edge Fidelity: 2. Of course, feel free to experiment. Click OK.
Adjust filter blend 03
Double-click the small icon to the right of Cutout under the layer. Set Mode to Soft Light for a subtler blend. Click OK.
Edit filter mask 04
Want to reduce the effect on the face (and other areas)? Click the filter mask and paint black to reduce and restore areas to their original splendour.