And what I am saying is if you travel in one direction and it loops back to your start possition, then it is already 4D.
Yes, that could mean that it's 4D (although in most cases you hard-code the looping behavior, rather than implementing actual 4D simulation).
And as Ive said the original topic was not implicetly about a 4D render, just Dimentions.
You're right - I misread it; somehow I though Mr. Picklesworth was referring to 4D renderers in addition to 4D coordinates.