Fenestra is a design visualization tool that transforms ideas into presentation-ready visuals within seconds. It supports inputs like sketches, 3D models, and mood boards, letting users create renderings in any visual style, including custom-trained aesthetics. Designers can import common 3D formats such as .FBX, .GLB, and .3DM, generate unique camera views, and share projects in full 3D without additional software. Fenestra fits into professional workflows by refining renderings, polishing collages, and enhancing or reimagining existing designs. With AI prompting, high-quality outputs, and user-controlled styles, it empowers designers to move from concept to presentation faster and with greater creative control.