Fenestra

Fenestra is a UK-based startup, aimed at architects, interior designers, and design studios, that offers an AI renderer, directly into the browser.

Fenestra is a cloud-native, web platform for generating architectural visualisations from hand sketches, 3D models (FBX, GLB, 3DM), CAD drawings, mood boards, and photos.

It supports interactive render creation, editing, animation, enhancement, and style customisation. Users upload their input, choose a style or reference, and Fenestra instantly converts it into polished visuals or cinematic walkthroughs. Whether tweaking facade details with natural language (e.g. “add trees”, “change to timber”), enhancing a low-quality render, or creating a short animation. Fenestra leverages diffusion-based AI for ‘sketch-to-render’, ‘model-to-render’, ‘moodboard-to-visual’, and ‘2D CAD-to-visual’ conversions. It supports natural-language edits, inpainting, and style transfer.