Studio HDR is a collection of 53 custom HDR maps used to quickly light your models. While there are a lot of HDRIs out there, this collection focuses on controlled studio lighting. Most of the lighting is a neutral white, while others include touches of blue and orange. These can be loaded into any software that accepts .hdr files. I have included a render scene with an old model I sculpted (based on a sketch by Max Grecke: https://www.artstation.com/maxgrecke) for both Blender 2.79b and Maya 2018.
Below are a few examples of the HDRs in use.
Rendering a Head Scan from Ten24
Rendering the included Ghost Boy head
Added Commercial License variant