Sentinel Tower

Cinevva's analyzer read this game's design doc and its source, then wrote the brief below. "Make your own" hands it to the game creator as your opening message, so you start from a real spec rather than a one-line idea.

Create a Three.js-style interactive 3D visualization called “Sentinel Tower,” not an action game. Show a freestanding industrial observation tower on a dark circular concrete site, viewed from an elevated three-quarter perspective. The scene should have a very dark blue-black background with subtle atmospheric fog, realistic soft shadows, metallic/concrete materials, and restrained industrial colors: gray steel, dark charcoal steel, pale gray concrete, muted yellow hazard accents, and translucent blue-gray glass-like railing/material highlights.

Model the tower as an approximately 30-meter elevated structure. Use four tall tapered cylindrical concrete support pillars arranged as the corners of a square, each rising from a concrete footing on the foundation pad to the upper platform. Add dark steel horizontal perimeter bracing at roughly three intermediate heights, connecting the four pillars on all four sides. Near the top, include a lower circular maintenance deck with a dark steel underside and a muted yellow hazard-colored outer rim. Above it, create the main circular observation platform: about 7 meters in diameter, with a steel slab, dark central core, clean circular steel outer rim, and a yellow hazard-striped-looking inner rim/accent. Add an access hatch on the platform surface in muted yellow.

Surround the top platform with an industrial circular safety railing: many evenly spaced thin steel posts and three horizontal circular rails at different heights. In the center, add a slim dark beacon mast extending above the railing, a small yellow cap/beacon housing, and a minimal horizontal antenna crossbar. Place a visible industrial catwalk stair prop or equivalent metal stairs near the lower maintenance deck, offset to one side. On the ground, use a broad circular concrete site/foundation, with a smaller raised circular foundation pad under the tower and eight sparse yellow hazard marker bars arranged around the site perimeter.

Light the scene with a strong cool daylight directional key light that casts soft shadows, a cool hemisphere/fill light, a subtle blue accent light, and a red warning beacon light at the mast. Make the red beacon gently pulse over time. Use physically based materials: highly metallic dark/gray steel with moderate roughness, rough nonmetallic concrete, and a slightly reflective/translucent blue-gray material where appropriate. Keep the composition uncluttered and architectural, with the tower centered and enough empty dark space around it to read its height.

Make the camera an orbit inspection viewer using mouse/touch drag to rotate around the tower and wheel/pinch to zoom. Start with the camera around position (38, 24, 42), aimed at approximately (0, 14, 0), using a perspective camera. Constrain zoom to a close-but-not-inside view and prevent orbiting below the structure; enable smooth damping. Include a “Reset view” button that restores the initial elevated three-quarter camera angle. Handle window resizing responsively.

Overlay a fixed dark translucent HUD with thin gray borders and a restrained technical-interface style. In the upper-left, show the uppercase spaced title “SENTINEL TOWER” and the subtitle “30 m elevated observation platform” followed by “industrial steel + concrete structure.” In the upper-right, show “HEIGHT 30 M,” “PLATFORM Ø 7 M,” and “STATUS OPERATIONAL,” with the status in pale green. At bottom-left show “Drag to orbit · wheel to zoom,” and at bottom-right provide the “Reset view” control. Use a dark navy-black page background, small clean sans-serif typography, subtle blur/shadow on HUD panels, and no score, enemies, weapons, character, or other invented gameplay systems.