Making background windows transparent

[link92]

Is there anyway to make windows in the background transparent?

 

[grapes911]

This just can up pretty recently. You should find some info here:
https://forums.macrumors.com/threads/179840/

 

[link92]

Spirited Away hides applications, and InvisRay always applies, not just on background apps.

 

[whyrichard]

are there any ways to do this with the current osx?

r.