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Q: Use a far tracker to position a distant light
A: The far tracker's position is it's current apparent position in the 3D environment and depends on the current frame: it moves with the camera. The far tracker's solve position is the actual direction vector to the light, with an arbitrary but generally convenient length. A light's position is the (lengthy) direction vector; it has no separate position since it has no unique parent to be associated with. So a variation on this will do the trick: make light 1's position tracker 140's solve position .
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