My engine needs a name...

[Ambientiger]

I could do with some help please, I'm having trouble finding a decent name for my engine.
I've had a few ideas, but none that really leap out at me;

Illusion source - something similar to mirage source.
ORP Engine - The standard acronym based approach.
Plague Engine - derived from thinking on the theme 'plagiarism'.

then I went blank!

Do you like any of the them so far, all suggestions greatly appreciated.