The template above may be partially or fully invisible or glitched due to the respected strings aren't entered. This is normal.
Documentation for Chamber infobox
title – The title of the chamber. It should be the same as the page name, with the "game" identifier removed.
valve-title – Optional: The Valve-assigned title of the chamber, as seen in the challenge mode of single player.
map – The .bsp map file in which the test chamber resides.
dirty – If set, will use the "dirty" style of the test chamber panel.
number – The numerical identifier of the test chamber.
previous – The name of the previous test chamber's page.
next – The name of the next test chamber's page.
total – The total amount of test chambers as reported by the in-game test chamber signs.
screenshot – The name of an uploaded screenshot to be used within the infobox.
noprogress – If set, will hide the progress bar.
icon1 – icon15 – Set these to the icons as shown on the in-game signs. Add "on" to the end to make them fully opaque, otherwise they default to semitransparent. If icon1 is not set, the icons will be hidden. Available icons:
walking on double (will be in better quality soon)