I don’t know about moving to a different room but I find that a complete change of scene is needed sometimes. That means leaving the home and going for a walk. Sometimes I just go to the park and sit down people watching. They stimulate my imagination and I can imagine all kinds of scenarios surrounding them.
Try it. Don’t forget to take a notepad and pen with you everywhere you go. If I forget, I record it on my phone. Sometimes I have ideas when I’m driving and can quickly pull over and record the essence of it.