  Interior design allows us to be who we are and live how we want - each design
is as unique as our distinct personality. However, it is not trivial for
non-professionals to express and materialize this since it requires aligning
functional and visual expectations with the constraints of physical space; this
renders interior design a luxury. To make it more accessible, we present
I-Design, a personalized interior designer that allows users to generate and
visualize their design goals through natural language communication. I-Design
starts with a team of large language model agents that engage in dialogues and
logical reasoning with one another, transforming textual user input into
feasible scene graph designs with relative object relationships. Subsequently,
an effective placement algorithm determines optimal locations for each object
within the scene. The final design is then constructed in 3D by retrieving and
integrating assets from an existing object database. Additionally, we propose a
new evaluation protocol that utilizes a vision-language model and complements
the design pipeline. Extensive quantitative and qualitative experiments show
that I-Design outperforms existing methods in delivering high-quality 3D design
solutions and aligning with abstract concepts that match user input, showcasing
its advantages across detailed 3D arrangement and conceptual fidelity.
