After speaking to Simon about my environment he suggested I added a bump map to everything rather than just the one thing, to keep the effect continueous. I think the bumps look good but they loose that cartoon style I'm after maybe? As well as bump mapping, I've added the cardboard texture to everything as this again keeps the effect continuous and not mix and match.
I've bumped mapped the log and tree in 5, leaving the other features plain with just the cardboard texture. Whereas 6 has no bump maps just the textures.