Strange shadow problems, also can't work out how to improve my scene quality.

Hi guys, couple of quick questions about my current project, I’m having very dirty internal shadows and a strange blob shaped exterior shadow. I’ve upped lightmap res and boosted lightmass settings but it still looks funky. All my meshes are separate so my uv’s should be pretty straight forward.

Also could anyone give me tips on making my scene look a little more like this one? I’ve made fairly decent materials in sub designer and upped lightmass settings, how do I get such a clean balanced look? even my laminate flooring doesn’t seem to pop like this regardless of how much I lower the roughness :S


Thanks in advance!