By way of information; I have found that there is quite a demand for this type of NPR image. Standard Imagecels stuff is fine if you are going for a photoreal effect, but just doesn't sit happily with native SU image export...or with many of the styles.
I used to use a brilliant Photoshop simplifier plugin called Buzz Pro to do this kind of stuff, but the company (Fo2pix) went out of business...although if you search hard enough, you might find some 'orphaned' copies floating about on the Net.
Topaz Labs took up the torch and now produce a filter called Topaz Simplify, which has a Buzz 'tribute' setting, producing much the same kind of effects. It will not only produce the kind of simplified image, like the trees, which blends well with SU's minimalist 'illustrative' look...but it can also produce effects that can turn all your existing photographic Face Me components into something that can blend in with just about every style that SU can produce.
Topaz Simplify Link
[image: transformer_lg.jpg]