Ice Sculpture grows your word in clear frozen glass — the letterforms build up with genuine specular highlights across their surfaces, catching light like carved ice rather than being tinted blue.
This is the only style here using feSpecularLighting, which computes real highlights from a light source rather than faking them with a gradient — the reason the surfaces look carved. feComposite and feGaussianBlur build the glassy interior, and iceGrow animates the crystallisation.
Ice Sculpture is a solid carved object with lit surfaces. Frost Grow is crystal spreading across letters one at a time, with icicles — surface frost rather than solid ice.