Have you not seen
Rango? It's an animated feature done with a primarily photo-realistic approach, which isn't surprising given it was done by ILM. It won the Oscar the year it was nominated, Tin Tin didn't even make the cut.
Rango is beautiful in its ugliness! ;P
But yeah OP, the studios most likely to pull what you're asking off that have the tech, pipeline, workflows, and years of inherent experience (i.e. the big VFX houses like ILM, WETA, etc) primarily work on VFX for live action films.