“feliz aniverzario” es un efecto de texto Letras de Sangre creado con FontVibe IA. Letras carmesí gruesas con una superficie roja oscura y húmeda y largos goteos de sangre que terminan en gotas redondas, aisladas sobre negro puro con luz lateral.

Thick crimson blood saturating every surface — viscous, high-density fluid with authentic physical behavior: large tear-shaped drops suspended at each drip terminus with surface tension visible at the meniscus, connecting streams thinning as they extend downward, deep near-black pooling where blood accumulates. Material properties: subsurface scattering gives deep red glow when backlit, specular gloss on convex drip surfaces catching directional light, matte-dark at clotted pooling zones. Blood color gradient from bright arterial red (#CC0000) at active drip streams to near-black clot (#3D0000) at base pools. Gravity-driven physics — every drip pulled downward with anatomically accurate tension. Horror film practical effects quality — not painted, not stylized, photorealistic blood. A death metal band's album art composition — pitch-dark underground crypt environment, crumbling stone archways receding into fog, single amber torch casting warm light from lower left. "feliz aniverzario" in massive blood drip font letters dominating the frame, set as a centered two-line title block: "feliz" above "aniverzario". Blood dripping and pooling on the crypt floor below. Cold rim light traces letter edges, warm torch light reflects off pooled blood on the stone floor. The band name floats above a barely visible skull motif. Album artwork quality — cinematic, visceral, death metal energy.