Use case: photorealistic-natural. Create ONE finished photographic website background for a coherent collection named Prism studies. Premium material still-life photography of real thick optical glass and physically believable refracted sunlight, captured on a medium-format camera. Architectural restraint and tactile detail: small irregular air bubbles within cast glass, fine moulded ribs where specified, plausible beveled edges, dense colored edges, subtle surface imperfections, contact shadows, realistic internal reflections and luminous but controlled caustics. The glass must look photographed, never glossy CGI, a plastic render, a generic abstract blob, a torus or a floating chrome object. Color comes from the glass and light, never an added digital gradient or haze. Deliberate asymmetric composition, no unnecessary props, no vase, no flowers, no sphere, no letters, typography, logos, watermark, browser, UI, border, collage, contact sheet or people. Output ONE standalone edge-to-edge image in the stated aspect ratio, using the highest native detail available. Preserve the requested calm copy space; keep sharp visual detail and bright caustics out of it. Scene and framing: A square 1:1 photographic close-up on a chalk-white matte surface. A thick clear frosted cast-glass pane enters at a shallow diagonal from lower-left, restricted to the bottom 38 percent; softly irregular fine vertical fluting refracts side daylight into gently repeating silver shadows just beside the glass. At the very bottom, clear polished edge reveals tiny bubbles and realistic thickness. Top 58 percent broad quiet near-white with no visible object or caustics. Ethereal but physically photographic, neutral ivory and faint cool gray only, no rainbow and no digital blur overlay.