AI rendering for interior designers — what works, what doesn't
A practical look at AI rendering for interior design: when AI Enhance beats path tracing, how to keep your model recognisable, and where Stability vs Gemini each shine.
AI rendering ≠ replacing renders
There's a temptation to throw your model at an AI and expect a hero shot. Sometimes that works. Often it produces something photorealistic but wrong — walls drift, furniture morphs, a window becomes a fireplace. Used carefully, AI is a fantastic finishing pass; used naively, it's a slot machine.
Here's what we've learned shipping AI rendering into a floor plan tool.
Path trace first, AI second
The most consistent workflow is to path trace the scene first, then Enhance (AI) the result. Path tracing gives the AI a structurally correct image to work from — straight walls, real shadows, predictable glass — so the AI's job becomes "make this look like a photo", not "invent a room from scratch".
Set AI Strength low (15–35%) and you get a polished version of your model. Crank it to 80% and you'll get something prettier but further from what you designed.
Gemini vs Stability
Both providers are good. Rough rule:
hallucinate dramatic styling.
preset selector. Better when you want "moody", "Scandinavian", "industrial loft" etc.
- Gemini — better at clean, neutral interiors. Less likely to
- Stability — wider creative range, especially with the style
We default to Gemini because it's more predictable; switch to Stability when you want flavour.
Use AI for moodboards, path tracing for client signoff
The two-pass workflow lets you have your cake. Pump out a dozen quick Enhance (AI) variations during early design exploration. When the client picks a direction, drop AI Strength down to 15% and re-render — that's your signoff image, still photoreal but anchored to the actual design.
Aspect ratios
For AI Video, 16:9 is what clients expect and what looks best on a laptop. 9:16 is for social — Instagram reels, TikTok. The 8-second cap on Runway video is short by design; pan around one hero view rather than trying to do a full walkthrough.
What to keep in mind
Strength is at 50%, you might get 4.
legible.
- AI cannot keep counts of things. If your kitchen has 3 stools and AI
- Materials drift. Marble can become granite, oak can become walnut.
- Text is unreliable. Don't expect signage on a wall to come back
For literal accuracy, path tracing is still the only answer. AI is a style pass — that's the right way to use it.