Does AI interior design keep my real room, or invent a new one?

It depends on the tool. General image models like Midjourney and Nano Banana treat your photo as inspiration and often redraw the walls, windows, and proportions, so the result looks like your room rather than being it. Purpose-built room tools instead edit your actual space to scale and keep the real layout, so the design is something you can genuinely build and furnish, not just a pretty picture.

Why do AI image generators change my room?

Because they paint a new image rather than editing yours. A general model is guided by your photo but generates fresh pixels to match the prompt, so walls shift, windows move, and proportions drift between attempts. Keeping a room geometrically consistent is a recognised open problem in the research: maintaining spatial consistency across views is “a significant challenge” that new methods are still being built to solve (SpatialGen, 2025). We show where this bites in practice in our honest guide to Nano Banana Pro.

Which AI tools keep your actual room?

Tools built specifically for room redesign, rather than general image generators. The difference is what they anchor to. A general model anchors to a prompt; a purpose-built tool anchors to your real photo or floor plan and edits within it, holding the walls, windows, and scale steady. That is the only way the redesign sits inside your actual room and connects to furniture you can really buy, which is the difference between designing and just dreaming.

How do you keep your real room in an AI redesign?

Three things help most:

• Use a tool that edits your photo or plan, not one that generates from text alone.
• Start from a floor plan when accuracy matters, because a plan carries true scale, unlike a single photo. See whether AI can measure a room from a photo.
• Tell the model to keep the existing layout, walls, and windows if you are using a general image model, and treat the result as a concept rather than a plan.

Summary

General AI image models often reinvent your room, because preserving exact geometry is still a hard research problem. Purpose-built room tools keep your real layout by editing your actual photo or floor plan to scale, which is what lets the design connect to furniture you can buy. If keeping your real room matters, choose a tool that anchors to your space, and start from a plan when accuracy counts.