To setup the light of a room using Blender Cycles we can use several different techniques and among them it is easy to choose the IBL as the most efficient. But, to use IBL with Cycles we need images that can be used as source for the light, and I just found an incredible library of high-resolution HDR maps for interior visualization. An artist called Maxime Roz released a pack of 6 HDR maps of interior scenes that could be easily used with Cycles. All files are licensed in Creative Commons Attribution-NoDerivatives 4.0, and have a resolution of 7K!
To download the files you must provide an e-mail address and the system will ask you for a donation. But wait! Isn’t that supposed to be free? If you don`t want to donate anything, just place a value of 0 on the donation and that download will start anyway.