I was suffering problems with TrackIR on sunny days. In my room, if sun is shining through the window, it‘s shining directly on the wall behind me and TrackIR starts going crazy because of to many tracked objects.
So my idea was to put a infrared filter foil directly on the TrackIR camera, so it lets only infrared light through. So i searched on amazon for such ir filter foil, but found only IR filters for dslr camera objectives. Then after some research i found out that you can use a floppy disc as a ir filter. So i took one floppy disc apart (don‘t ask me why i had a floppy disc at home in 2019 :D ) cut it so it matches the front of the TrackIR camera and put it on with scotch tape.
And well, it works! TrackIR now only see the three leds from track clip pro but no sun spots on the wall behind me.
On the pics you can see the sun spots recognized by TrackIR camera without floppy dics and afterwards with floppy disc where only three track clip pro led’s are visible
Hope this helps you guys