Here is another great example of architectural visualization from the well-known artist Enrico Cerica and this time, his project uses Blender for almost all 3d models and Octane Render to generate an impressive collection of images. There isn't much information about the hardware or process used to create the images, but the lighting of the project is all based on HDR maps and a Sun Light. For the post production, he uses GIMP to get rid of color related problems and lighting issues. A project like Variant House is an example of how powerful Blender is to improve architectural visualization.
Do you want to check out some other projects from Enrico Cerica? Visit his portfolio, which is amazing, and here is a list of some other projects featured on Blender 3D Architect. As always, an incredible collection of architectural visualization projects: