In the 2D computer game WordLand--which is just an idea--characters walk around on top of a very large document, something like 20'x20'. I don't intend to print this on a poster. How can I get tex/luatex/latex etc. to use a 20 foot page size?
To quote TeX (which you can reproduce by typing
into a document and running
tex on it):
! Dimension too large. l.1 \hsize=666in ? H I can't work with sizes bigger than about 19 feet. Continue and I'll use the largest value I can.
Or, if you look at the TeXbook, on page 58, you have
TeX will not deal with dimensions whose absolute value is 230 sp or more. In other words, the maximum legal dimension is slightly less than 16384 pt. This is a distance of about 18.892 feet (5.7583 meters), so it won't cramp your style.
But in our case, it indeed cramps your style.