Transparent oF with modified cocoa window.
It seems no fps drop.

i will share soon :-)

P.S.
Some people ask me about 3D blob(MetaBall).
this blob is generated in realtime, and i textured it using shader.
And i use osx native Text-To-Speech function (system(“say ‘blah blah’);).

Edit::
released here
openframeworks.cc/forum/viewtopic.php?f=10&t=4811