“U” is a Glass text effect 使用 FontVibe AI 创作的文字效果. 透明光学玻璃大写字母折射光线，边缘高光明亮并带焦散，倒映在深色台面上，背景是青绿色极光夜空.

sculpted from high-clarity optical glass — letters cast from pure transparent glass with intense light refraction through the material body. Brilliant caustic light patterns projected below each letter. Sharp specular highlights trace the letter edges where glass thickness transitions. Slight organic surface tension gives letterforms a subtle liquid-pulled quality at terminals and curves. Deep internal optical depth visible through the glass. Purely transparent — no frosting, no color tinting, no opacity. LETTERFORM PRIORITY: when the chosen font carries its own treatment, that font's letterform shapes take priority and own the letters; this style governs the optical-glass material, the refraction and the caustics. FALLBACK MATERIAL: if the font carries no material of its own, render the letters as high-clarity transparent optical glass with intense refraction, sharp edge specular highlights and bright caustic patterns cast below. COLOR PRIORITY: keep the font's own colors if specified; otherwise pure clear glass with no tint. A single oversized rendered "U" formed from pure high-clarity optical glass, completely transparent with deep visible internal thickness, strong lens-like refraction, and subtle liquid-pulled tension at the inner curve and terminal transitions. Preserve the supplied letterform silhouette exactly; let only the material transform it. Crisp white specular ribbons follow every glass edge, with bright ray-traced highlights where the thickness changes. A pale lavender-to-cool-blue studio gradient passes visibly through the transparent body, warped by internal refraction without adding any tint to the glass itself. Clean matte acrylic ground plane receives sharply defined yet softly feathered caustic pools and prismatic light fragments cast beneath the letter. Diffuse backlight travels through the transparent volume, balanced by a broad overhead softbox and narrow edge lights, revealing internal optical depth and multiple reflected contours. Sparse gallery-scale composition, ample unmarked negative space, no additional words, no objects, no opaque surfaces, no frost, no haze, no color fill. High-resolution product render, physically accurate glass shader, ray-traced transmission, caustic illumination, controlled studio exposure.