Hi Marc, 
 
> There will be two different graphic engines for Win and Mac ? 
 
Sort of, since Windows will use Direct3D11 and Mac will use OpenGL. But hopefully it will be more like one engine that has 2 different output targets with a lot of common code rather than being totally different. 
 
That's the part that I'm working on figuring out next. 
 
     - Michael 
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