Is this a Photoshop effect?

[Bman007]

I'm trying to identify whether it's a filter or a technique that totally smooths out these photographs? I've seen it subtly done, but also to the point it looks like paint or animation. I've poked around looking in Posterize and Oil Paint, but can't find anything that does this. It's like a smoothing version of Posterize, because so much detail can be removed. 

[Chuck Uebele]

Could be surface blur or a combination of filters and/or effects.

[Bman007]

Thanks Chuck, surface blur seems promising. Combined with a little smudge painting.