Thanks for your comments...
I actually meant these images to be more on the sketchy side but the people cutouts really didn't help that as they bring a photo touch to it that competes with the sketch.
Otherwise I like the mix between the sketchy feel and some GI/irradiance effects.
sepo, the trees I think you are talking about are actually a component I got from the warehouse. It is the "arvore 3" by Gabriel Felin. I think this is one of the best trees out there for fill in trees at a small memory footprint. All I did is explode the leaves and make them cast shadows, podium follows the transparency for a nice detailed shadow (unlike SU). I love the way these trees render.