“TURN BACK NOW DO NOT ENTER KEEP OUT”是使用 FontVibe AI 创作的血滴字体文字效果。粗体深红字母，表面湿润暗红，长长的血滴末端凝成圆珠，在侧光下孤立于纯黑背景。

Create a finished vertical 2:3 haunted-hallway door sign, photographed straight-on. A tall rectangular black-painted wood plaque fills 82% of the canvas, mounted against a pure black doorway; two oxidized iron mounting bolts sit at the upper corners. The plaque has chipped lacquer, shallow gouges, a thin recessed border, and a small antique iron keyhole plate at its lower centre. No warm colours. Set the exact text, with perfect spelling and legibility: small top warning: “DO NOT ENTER” main headline, three stacked lines: “TURN” / “BACK” / “NOW” small bottom line: “KEEP OUT” “TURN BACK NOW” dominates the central 58% of the sign in custom narrow compressed gothic blackletter: thick vertical stems, flat broad-nib construction, diamond-shaped cap and baseline serifs, hairline diagonal crossbars, pointed arch joints, tight controlled spacing. The letter structure remains sharply readable. Deep crimson blood infiltrates the blackletter: wet red film saturating thick stems, fine capillary traces on hairlines, beads gathered at every diamond tip, and long viscous drops hanging from the lowest terminals. Use physical fluid behaviour: thick source at the letter base, thinning connecting stream, rounded tear-shaped terminal drops with visible surface tension; small pooled clot at the bottom of the word block. Blood grades from arterial red #CC0000 in fresh wet streams to near-black #3D0000 in pooled clots. Wet convex surfaces catch specular light; pooled areas are matte-dark. Subsurface red glow is visible only through the thicker wet blood. Set “DO NOT ENTER” and “KEEP OUT” in small condensed engraved capitals, pale cold gray with slight abrasion, widely tracked, aligned to the plaque centre. Light with a cold directional key from upper left and a narrow dim red rim from the right, tracing every gothic edge and droplet. Add sparse suspended dark-red droplets and faint black mist around the plaque edges, but keep the background nearly pure black. Horror-film practical-effects realism, crisp material detail, no cartoon styling, no colourful decoration, no extra text.