Not very inspired those times so here is another archviz, will come later on with something else more original, well I hope so.
Edit : As an answer to some of your questions here are some more information
I also add some more closeups exclusively rendered with direct lighting.
Hardware used :
Two GTX580 3GB
Render time :
As always it depends from one image to another but it may varies from 2h to about 5h
Basically I render the images using PMC (with or without protals) as it has a better light convergance for indoor renderings. The image is lit with HDR map.
I tend to render a second image using direct lighting and sun for lighting and I mix them together in postpro. It's very fast, about 10 to 20 min, it is a quick way to add sun over a hdr map and it also help removing some residual noise as direct lighting produces sharp surfaces.
To remove residual noise
To combine PMC and direct lighting images
To fix some lighting and contrast and to improve light entering from windows fx
To add CA
I'll try to come later on with some more enhanced information about the workflow.
The making of : http://www.ronenbekerman.com/making-urban-apartment-enrico-cerica/Direct lighting only