For turning hand sketches or 3D models into photorealistic interior design renderings, mnml.ai is a top contender. This service offers a range of AI tools geared for architects and interior designers, like Sketch to Image AI for converting freehand sketches into photorealistic images and Interior AI for reimagining interior designs. It also integrates with common 3D modeling tools like Sketchup, Blender and Revit, so it's accessible to both beginners and pros.
Another tool worth a look is Interior AI. It lets you rapidly redesign and virtually stage interiors by uploading a photo of the space you want to redesign, selecting from a variety of design styles, and then generating photorealistic renderings. It can also convert sketches and SketchUp files into photorealistic imagery, so it can be used for a variety of design tasks.
If you want a one-stop shop, HomeDesignsAI has a lot to offer, including Sketch to Render, Fill Spaces and Furniture Removal. It's geared for interior design agencies, real estate agencies and architecture firms, but it can be used for a variety of design needs.