Our workflow and approach; we always like to approach our renderings to be realistic and clean rather than the typical artistic approach( which we really enjoy as well). We spend a lot of time getting nice lighting before adding textures.
We used Cinema 4D R16 with Corona alphas 3, 5, and 6 as we struggled with a lot of crashes. Modelling was done in Sketchup and some of the asset models from our library collection, presumably
most from purchases we got from Turbosquid and 3DSky in order to speedup work flow, some were modeled in house however.
The image of the mixed-use building was rendered using hdri only and the house was rendered with Vizpark Hdri Skydome #28 and the corona sun manually lined up.
We typically put everything into our renderings except for 2d people which were added in Photoshop. Post production for us is always minimal, just simple white balance, sharpening, and a bit of Levels. We also add lens flare in Photoshop as well, for some reason we still could not achieve in Cinema 4d even with Corona Alpha 6 (Final)