I am having the same problem, I cannot use my trackir until it is dark out or I place a heavy blanket over my window, which looks pretty ghetto and makes my wife rather unhappy. Is there anything I cna do to tweak it?
I use my TrackIR 5 at work in a well lit location with open windows all over the place. The key is, they aren't directly in the camera's view. So, lots of ambient light is no problem at all. Specific small pieces of bright light are also accounted for pretty well by our new Spurious Marker Rejection. But, open windows with sunlight streaming through are still a problem if they are in the camera's direct sunlight. IR light is IR light, so filtering is tricky. We can isolate and reject small, immobile sources of light through trajectorization math, but big swatches are a different matter.