Initiate a cinematic walkthrough of a grand cathedral interior. The camera rapidly moves through the space, executing a full 360-degree rotation to reveal the entire environment. Showcase the interior architecture and the imposing presence of massive trees that grow within the cathedral's structure. Maintain a cinematic lighting style to enhance the grandeur and depth of the scene, highlighting the intricate details of the room. Capture the feeling of an expansive, visually impressive interior space through fluid camera motion.