You’ll need to connect the monitor to the 580 to use it for most games. There may be some games out there that allow you to redirect the render engine to a separate video card… but I doubt that is very common.
Not if you want the 3d light to interact with a 3d object (plexus) while existing in a 3d world and affected by a 3d camera. In that case you need to position the like inside of 3d space not 2d. I will say that if you aren’t using lux or other plugin to make the light visible then you have a lot of forgivenesss for the position of the light. So hand positioning it should work.
The latest drivers are maintained by NVidia not Apple. And now have a unified driver set, which works with all their current cards. Question is just how long will it take to update with support for 680. My hope is it will ship with a supporting driver.
Well the 2d tracker isn’t going o give you a 3d location to null to. Are there any tracked points that coincide in space with the object you want to track? If you can find a point in your ae world that matches a point where the object passes, and the object is moving smoothly… Then you should be able to hand track the object in 3d space. I used to use matchmover pro which let you add tracking points manually in addition to automatically and include them in your scene. Thereby enabeling this. A true 3d track of an object moving independently of camera isn’t possible in any way I can think of in ae. Manually may be the only way.