X-Ray is a set of tools for baking light, reflection, and multilayer texturing right inside of Maya, unlike other real-time render engines, the quality of light and shadow you get with x-ray matches the quality of the offline render engines.
The first version of the X-Ray is available as a bundle with Maya X.
https://cgelementary.gumroad.com/l/MayaX
The first scene is modeled by KlessGyzen