blender camera malfunction

help! i have a school projectdue in 3 days, and all the cameras in my scene only render a muccy shade of brown/red! no matter which camera i set as my main one, this is all it renders :confused: please help! everything worked fine woth it, untill i changed the main camera :confused:

(shudder) 3 dayssssssss

Sorry for being so late, but did you check that the β€œTraceable” button in the Shading (F5) section was pressed on?