For Warframe on the PlayStation 4, a GameFAQs message board topic The treasure rooms that are like obstacle courses are not found in exterminate missions. You can only find them in capture or mobile defence missions.
subreddit:subreddit: find submissions in "subreddit"; author:username .. Possibly also bigger maps with more chance of treasure rooms /etc.
Warframe Step on a switch in a totally different room? Capture missions tend to have the most rooms you can find, with MD being in second. Pressing this will open a new room that is opposite of the upward fall shown. About halfway along the course is a small alcove in the wall seen. If you catch anything I miss or have a screenshot to help illustrate a point, comment and I'll add it. Log In to GameFAQs. Also, when the new Orokin tiles come out soon be sure to message me with any finds.