There's more to this Easter egg than meets the eye.
![image image](/t5/image/serverpage/image-id/63392i91BF07873F919CFD/image-size/large?v=v2&px=999)
This Easter Egg was created with a Mathcad Prime 6.0 Surface Plot, all within PTC Mathcad.
Download the attached Mathcad Prime file (EE.mcdx), manipulate the surface plot display, and see if you can find the hidden message.
h/t Anji Seberino!