This option (Page tex) is enabled globally by 3dsmax scene and 3ds max does not warn about it.
Ie if you open another scene in which this parameter is on, then you will remain constantly active, even after rebooting 3dsmax.
I think this is a BIG BUG of the 3dsMax.
Return unto me several people with the problem of very long render simple scenes, and after 4 hours of searching I managed to find the cause.