David in New York City says:
I have to shoot some model apartments in NYC and they are extremely small. Wherever I put the camera, while still trying to get the whole room in the shot, whatever is close to the camera looks HUGE and the other things look tiny. Also, straight lines are curved or leaning back and generally just not straight. Rough shooting... Do you have any content or resources (or just plain advice) to address these challenges? I'm shooting with a Canon 11-24mm on a 5DMKIV.
Yes, shooting small rooms can be a challenge but using an 11-24mm on a full frame camera is not a solution as you've found. It's important when shooting interiors that you keep the perspective distortion to a minimum (see the video above). Also, verticals must be kept vertical. This is done by leveling the camera or in post-processing. As illustrated in the video, all wide-angle lenses have perspective distortion but when you get wider than about 16mm, it gets very bad.
So the solution is:
Using this restrained composition is the best you can do in very small rooms.