HDRI Sky Domes vol. 1

The selection of 30 clean hdri sky domes was tweaked and optimized for Blender Cycles rendering engine. Download it, unzip it to your Library Assets Path, and use it as any other asset (drag & drop).
There is no better way to add realism to your scene in Blender. If you are an Architectural Visualization PRO working in Blender, it is a must-have one. It is also available at BlenderMarket