You start to miss planes at x2 TC. Its possible that one will fly at the edge of the 3d world and get missed by the position calculateing system. Possible, but unlikely.
Its also possible that you will see a plane at x2048 TC if the planes foot step happens to fall in the 3d world zone. Possible, but unlikely.
Above x512 TC it is getting very unlikely that you will see a plane, but not impossible as HunterICX demonstrates.
Below x128TC it is getting very unlikely that you miss a plane.
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