「DO NOT WATCH NIGHTMARE FUEL」は FontVibe AI で作成した血のしたたるフォントの文字エフェクトです。濡れた暗赤色の表面を持つ太い深紅の文字。長い血の滴は丸い粒で終わり、横からの光を受けて真っ黒な背景に浮かびます。

A YouTube thumbnail, 16:9, horror. Pure black background with a faint cold dark-red haze behind the lettering. Lettering reads exactly "DO NOT" on the first line, smaller, and "WATCH" on the second line, huge, filling about 85% of the frame width and about 55% of its height. All letters are hand-painted with viscous blood, as if smeared with a finger: uneven stroke widths, thick near-black clotted accumulations, brighter arterial red (#CC0000) in thinner areas, a dried dark crust along the stroke edges, and a wet glossy sheen. "DO NOT" is slightly smaller, sits above and left-aligned to the title, and is rendered in the same blood lettering. Thick tear-shaped drops hang from the base of WATCH, each held by surface tension with a round bulb at the end and a thinning stream above it. Drips are uneven in length and a few run down toward the bottom edge. A small deep-black pool gathers at the bottom with a glossy dark-red meniscus. Dim cold crimson rim light comes from the right and catches the convex drips, and subsurface glow shows deep red in the thin parts. In the lower right, small clean white condensed sans caps read "NIGHTMARE FUEL" with a thin blood-red underline, sitting on the black. Extremely high contrast, with the title readable at a tiny size. No other decoration and no bright or warm colours. Visceral, brutal, practical-effects realism.