I digitized this illusion while sitting in a hotel room in Prague in the Czech Republic. I was there attending an IBM Domino Server Administration course. As I was running out of time for that month there was no other option but to do it on my spare time on the trip. I had endured a very bad headache the day prior to doing the finishing touches, this caused the majority of the creation process to be quite painful, but I prevailed and in the end I think it was worth it :P
This impossible tribar has internal connections between two of the bars, the number of connecting bars are different for each side.