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Walkable demo

Lost Valley Trail

Walk a jungle loop past nesting meadows, grazing herds, striding sauropods and a tyrannosaurus guarding its clearing.

About

A 68 by 56 m outdoor valley loop walked south to north, built from every one of the pack's 19 members. Two habitat island pads form planted clearings in the north corners, and the pack's two composed scenes anchor the ends of the loop: the herbivore grove in the west and the predator clearing in the east.

Placed: all 10 dinosaurs (tyrannosaurus twice, velociraptor five times as a hunting pack, brachiosaurus, diplodocus, spinosaurus, triceratops, stegosaurus, parasaurolophus, pachycephalosaurus and ankylosaurus pairs), six egg nests ringed with speckled eggs, and deep planting of cycads, tree ferns, ground ferns and mossy boulders, including beds on top of the island pads and thickets along the fence.

What moves: nothing. The pack ships no animation clips, so every placement uses the default proximity behaviour with no clips to trigger, and all figures read as posed sculptures. The tyrannosaurus at the clearing mouth and the circling raptors are staged poses, not loops.

What is not placed and why: nothing is left out. All 19 published members appear, most many times. The 48 distinct model target does not apply here because the pack holds 19 designs, so density comes from repeats: fern beds, egg rings and the five strong raptor pack.

Every piece here is a published model from the pack, placed by hand. Walk with the keys or touch, and approach a piece to see it move if it has animation. Colliders, navigation and gameplay are yours to add.

Points of interest

Use with an AI agent

Copy this prompt into your AI chat to rebuild the layout, then describe what to change.

Rebuild the "Lost Valley Trail" demo scene from the Lost Valley Dinosaurs pack in my project.

Layout (JSON, every placement with its CDN URL): https://3dassets.dev/api/v1/demos/lost-valley-dinosaurs
Pack manifest: https://3dassets.dev/api/v1/packs/lost-valley-dinosaurs
Demo page: https://3dassets.dev/demos/lost-valley-dinosaurs

- 207 placements of 19 models; units are metres, +Y up, rotation is yaw in degrees about +Y
- Spawn at (0, 0, 25) facing 180 degrees; eye height 1.6 m
- Licence: CC0 1.0 Universal (no attribution required)
- Loading: three.js GLTFLoader, one load per distinct model, cloned per placement; no decoders required

Also available as JSON or Markdown, and via the MCP server.

Common questions

How do I use Lost Valley Trail with my AI development tools?
Press "Copy for AI agent" above and paste the prompt into Claude Code, Cursor, Codex, GitHub Copilot, ChatGPT or any other coding assistant. The prompt carries the direct CDN URL, the real-world size, the licence and the loading notes, so the assistant can fetch the scene and place it in your project without you writing the loader yourself. For a permanent connection, add the 3DAssets.dev MCP server to your tool with one command (for Claude Code: claude mcp add --transport http 3dassets https://3dassets.dev/mcp) and the assistant can then search the whole catalogue, fetch files and read the usage snippets on its own.

MCP server setupGuide for AI agents

How do I get started?
Walk the scene here with the keys or touch to see how the pack fits together. To build it yourself, download the pack with the button, then copy the "Copy for AI agent" prompt: it links the layout JSON, which lists every placement with its position, rotation and CDN URL, so an assistant connected to the MCP server can rebuild the scene in your engine and change it to order.

MCP server setup

Which game engines and tools can I use Lost Valley Trail with?
Anything that reads glTF, which today means all of the major ones: three.js and React Three Fiber on the web, Godot 4, Unity, Unreal Engine 5, Blender and the model-viewer web component. Every model in the scene is a self-contained binary glTF (.glb) with textures embedded, so each is one file to import and no plugin, converter or decoder to install first.
How do I import this scene into Unity, Godot, Unreal or Blender?
Unity: install the glTFast package (com.unity.cloud.gltfast) from the Package Manager, drop the .glb into Assets and drag the prefab in, or load it at runtime from the CDN URL. Godot 4: copy the file into the project folder and the editor imports it as a scene you can instantiate. Unreal Engine 5: File > Import with the built-in glTF importer, which converts the axes for you. Blender: File > Import > glTF 2.0. Units are metres with +Y up in the file, and every importer above handles the conversion to its own axes automatically.
Can I use Lost Valley Trail in a commercial game, and do I need to credit anyone?
Yes to commercial use and no to credit. Every scene on 3DAssets.dev is released under CC0 1.0 Universal, which places it in the public domain: use it in a paid game, an app, a film or a client project, modify it, redistribute it, and put nothing in the credits. A link back is welcome but it is entirely your choice.

CC0 licence text

Can I load it from the CDN instead of downloading it?
Yes. The pack behind it has a permanent URL on cdn.3dassets.dev that is CORS-enabled and never changes content, so you can pass it straight to GLTFLoader, glTFast or model-viewer in production and cache it as hard as you like. Downloading is only needed for engines that import from disk.
Is the demo itself a file I can download?
No, and it does not need to be. A demo is a layout of the pack's published models composed in your browser from the CDN, so there is no extra file to fetch. Download the pack for the models, and take the layout JSON linked above for the placements: together they are the whole scene, and an AI agent can rebuild it from those two links.
Can I change the scene, or add gameplay to it?
Yes. The layout is plain data in metres, so move, add or remove placements freely in your own engine. Colliders, navigation and gameplay are yours to add: the demo shows what the pack looks like assembled, and your game decides how it plays.

Models in this demo

Herbivore Grove (Lost Valley Dinosaurs)

Herbivore Grove (Lost Valley Dinosaurs)

A small fictional grove with three herbivores, a nest and prehistoric foliage.

@3dassets26.9k tris · 13 ↓
Predator Clearing (Lost Valley Dinosaurs)

Predator Clearing (Lost Valley Dinosaurs)

Two predators explore a fern-filled island, with open space for gameplay.

@3dassets19.0k tris · 8 ↓
Triceratops (Lost Valley Dinosaurs)

Triceratops (Lost Valley Dinosaurs)

Three-horned ochre herbivore with a broad coral-and-gold frill.

@3dassets6.5k tris · 11 ↓
Stegosaurus (Lost Valley Dinosaurs)

Stegosaurus (Lost Valley Dinosaurs)

Jade herbivore with staggered coral plates and four tail spikes.

@3dassets6.9k tris · 8 ↓
Ankylosaurus (Lost Valley Dinosaurs)

Ankylosaurus (Lost Valley Dinosaurs)

Blue armoured dinosaur with gold scutes, flank spikes and a tail club.

@3dassets10.5k tris · 7 ↓
Brachiosaurus (Lost Valley Dinosaurs)

Brachiosaurus (Lost Valley Dinosaurs)

Tall jade sauropod with an upright neck and tiny rounded head.

@3dassets7.3k tris · 8 ↓
Diplodocus (Lost Valley Dinosaurs)

Diplodocus (Lost Valley Dinosaurs)

Blue sauropod with a low sweeping neck and long balancing tail.

@3dassets7.3k tris · 9 ↓
Parasaurolophus (Lost Valley Dinosaurs)

Parasaurolophus (Lost Valley Dinosaurs)

Ochre duckbill with a long swept-back tubular crest.

@3dassets7.2k tris · 8 ↓
Pachycephalosaurus (Lost Valley Dinosaurs)

Pachycephalosaurus (Lost Valley Dinosaurs)

Jade dome-headed dinosaur with a ring of pale skull knobs.

@3dassets8.2k tris · 7 ↓
Tyrannosaurus (Lost Valley Dinosaurs)

Tyrannosaurus (Lost Valley Dinosaurs)

Coral predator with a broad jaw, tiny arms and cream teeth.

@3dassets8.7k tris · 8 ↓
Spinosaurus (Lost Valley Dinosaurs)

Spinosaurus (Lost Valley Dinosaurs)

Blue river predator with a tall coral sail and elongated snout.

@3dassets8.8k tris · 9 ↓
Velociraptor (Lost Valley Dinosaurs)

Velociraptor (Lost Valley Dinosaurs)

Small jade runner with feather fans and raised sickle claws.

@3dassets7.2k tris · 7 ↓
Dinosaur Egg Nest (Lost Valley Dinosaurs)

Dinosaur Egg Nest (Lost Valley Dinosaurs)

Raised earthen nest holding three pale eggs.

@3dassets3.0k tris · 9 ↓
Speckled Dinosaur Egg (Lost Valley Dinosaurs)

Speckled Dinosaur Egg (Lost Valley Dinosaurs)

Standalone cream egg with warm ochre speckles.

@3dassets1.3k tris · 8 ↓
Habitat Island (Lost Valley Dinosaurs)

Habitat Island (Lost Valley Dinosaurs)

Oval grassy display island, approximately eleven metres wide.

@3dassets336 tris · 7 ↓
Ground Fern (Lost Valley Dinosaurs)

Ground Fern (Lost Valley Dinosaurs)

Low radial fern for nest edges and forest floors.

@3dassets660 tris · 7 ↓
Cycad (Lost Valley Dinosaurs)

Cycad (Lost Valley Dinosaurs)

Short woody cycad with a radial crown of broad fronds.

@3dassets740 tris · 8 ↓
Tree Fern (Lost Valley Dinosaurs)

Tree Fern (Lost Valley Dinosaurs)

Tall slender tree fern with a spreading green canopy.

@3dassets820 tris · 9 ↓
Mossy Boulders (Lost Valley Dinosaurs)

Mossy Boulders (Lost Valley Dinosaurs)

Rounded earth-coloured boulder cluster with a moss cap.

@3dassets504 tris · 8 ↓