p_tendril — CRAWLER

A ferrofluid tentacle monster hauling itself through the crystal-lit cave (cavern geometry from preseed.tendril.cave). The whole creature is ONE GPU-scattered runtime mesh driven by preseed.parts.ten_scatter:

• a heaving black body blob with animated magnetic spikes and blinking eye-spots (ferrofluid-on-magnet look)
• ten continuous tapered tentacle tubes, each a cubic bezier whose control points the part's Luau state machine writes into a params buffer every frame — tentacles snap out and grip walls, floor and ceiling; two "feelers" probe toward the camera
• goo droplets that cling to tentacle undersides, stretch and fall

Shading is the ten_goo ferrofluid surface (ten_goo_mat), with glossy black floor puddles (ten_goo_puddle) round-robined along the trail and at floor-grip points. A red underglow point light throws moving tentacle shadows up the cave walls, and crystal clusters ring with the music.

The camera runs a cut-based cinematic shot list (stalk / track / static pass-by / top-down / final confrontation) with handheld jitter. In the last chamber the creature stops, rears up, fans its tentacles and opens every eye while the camera pushes in.