3DAssets.dev
Loading model…

About

Open circular broken rim descending to an empty central shaft. 5.62 × 1.10 × 5.56 metres. Original CC0 static cave geometry with embedded nearest-filtered pixel textures. +Y up; grounded at y=0. No collision, navigation, rig or animation data.

Use with an AI agent

Copy this prompt into your AI chat, then describe what you want to build with the asset.

Use the “Surface sinkhole (Cave and Crystal Caverns)” asset in my project.

Model: https://cdn.3dassets.dev/assets/21241/v1/model.glb
Asset page: https://3dassets.dev/assets/cave-and-crystal-networks-sinkhole-4045e8d9
Description: Open circular broken rim descending to an empty central shaft.

- Dimensions (X × Y × Z): 5.62 × 1.1 × 5.563 metres
- Triangles: 456
- Animations: none
- Licence: CC0 1.0 Universal (https://creativecommons.org/publicdomain/zero/1.0/)
- Loading: Three.js GLTFLoader; no additional decoders required.

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

Import manually

Choose your framework, then copy the code into your project to load the asset.

import { GLTFLoader } from 'three/addons/loaders/GLTFLoader.js'

const loader = new GLTFLoader()
loader.load('https://cdn.3dassets.dev/assets/21241/v1/model.glb', (gltf) => {
  scene.add(gltf.scene)
})

Common questions

How do I use this model 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 model 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?
Three ways, from quickest to most automatic. Download the .glb with the button and drop it into your engine's asset folder, where it imports like any glTF file. Or skip the download: copy the three.js, React Three Fiber or model-viewer snippet under "Import manually", which loads the model straight from the CDN. Or connect your AI agent to the MCP server and ask for it by name, and it will find, fetch and place the model for you.

MCP server setupAPI reference

Which game engines and tools can I use this model 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. The model is a self-contained binary glTF (.glb) with textures embedded, so there is one file to import and no plugin, converter or decoder to install first.
How do I import this model 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 this model in a commercial game, and do I need to credit anyone?
Yes to commercial use and no to credit. Every model 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 .glb file 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.
Do I need Draco, Meshopt or KTX2 to load it?
No. The geometry is quantized with KHR_mesh_quantization and the textures are re-encoded to WebP, both of which three.js, Godot, Unity and Blender read natively, so a plain GLTFLoader is enough. There is nothing extra to configure and no decoder to ship with your bundle.

Surface sinkhole (Cave and Crystal Caverns)

Open circular broken rim descending to an empty central shaft.

Download asset · 30.1 KB

More in Nature & Landscape

Goat willow shrub tree (Forest Trees and Woodland Plants)

Goat willow shrub tree (Forest Trees and Woodland Plants)

Five-stemmed goat willow rising from a low stool, each stem carrying rounded foliage clumps. 5.38 x 9.09 x 5.23 m.

@3dassets1.5k tris · 2 ↓
Potted Fern in a Clay Pot (Jelly Friends Playroom)

Potted Fern in a Clay Pot (Jelly Friends Playroom)

Free 3D potted fern, 0.43 m tall in a 0.26 m clay pot with nine arching fronds. Game asset for a playroom, living room or nursery corner.

@3dassets11.5k tris
Potted Olive Tree (Tactical Shooter Hill Town)

Potted Olive Tree (Tactical Shooter Hill Town)

Free 3D model of a potted olive tree for a tactical FPS hill town map kit. Measures 1.71 by 2.17 by 1.61 m.

@3dassets1.7k tris
Tall Grass Clump (Wipe Day Survival Island)

Tall Grass Clump (Wipe Day Survival Island)

Free 3D low poly tall grass clump for island ground cover: eighteen fanned blades about 0.9 m wide and 1 m tall, cheap enough to scatter.

@3dassets216 tris
Shoreline Rock (Wipe Day Survival Island)

Shoreline Rock (Wipe Day Survival Island)

Free 3D low poly shoreline rock for beach edges: a flat wave worn slab about 2.5 m wide with two shoulders and five loose stones around it.

@3dassets258 tris
Sand Dune Bank (Wipe Day Survival Island)

Sand Dune Bank (Wipe Day Survival Island)

Free 3D low poly sand dune bank for shorelines: a 4.9 m sand bank with a wind shaped face, two blown ends, six pebbles along its toe and nine marram grass tufts, 1.1 m at its highest.

@3dassets760 tris
Boulder Small (Wipe Day Survival Island)

Boulder Small (Wipe Day Survival Island)

Free 3D low poly boulder for island terrain: a four lump granite mass about 1.8 m across, the smaller of the pair.

@3dassets164 tris
Berry Bush (Wipe Day Survival Island)

Berry Bush (Wipe Day Survival Island)

Free 3D low poly berry bush game asset: four foliage clusters about 1 m across carrying nine red berries for a gatherable food node.

@3dassets494 tris
Boulder (Wipe Day Survival Island)

Boulder (Wipe Day Survival Island)

Free 3D low poly boulder for island terrain: a four lump granite mass about 3.4 m across, the larger of the pair.

@3dassets164 tris
Mushroom Cluster (Wipe Day Survival Island)

Mushroom Cluster (Wipe Day Survival Island)

Free 3D low poly mushroom cluster for forest floors: four rust capped mushrooms on pale stalks, the tallest 0.31 m, a small foragable food node.

@3dassets288 tris
Fibre Plant (Wipe Day Survival Island)

Fibre Plant (Wipe Day Survival Island)

Free 3D low poly fibre plant for survival gathering: a hemp like rosette of twelve blades standing out of a woody crown, about 0.7 m wide and 0.9 m tall.

@3dassets180 tris
Dead Tree (Wipe Day Survival Island)

Dead Tree (Wipe Day Survival Island)

Free 3D low poly dead tree for survival and horror scenes: a bare split trunk with four forked limbs and no foliage, 4.8 m tall.

@3dassets300 tris

Similar assets

Shaft station chamber (Underground Mine and Shaft Works)Animated

Shaft station chamber (Underground Mine and Shaft Works)

An 8 m square shaft station excavated at 5.6 m clear height, with arched drift openings north and south, a 3.6 m by 2.4 m shaft opening through the back, a lined shaft sleeve above with buntons and guides, a steel roof frame and a named landing gate.

@3dassets936 tris
Surface shaft headworks (Underground Mine and Shaft Works)

Surface shaft headworks (Underground Mine and Shaft Works)

The surface headworks: the headframe standing over the shaft collar with the man cage at the deck, the winder house facing it across the rope run, the main ventilation fan house on its plinth, the tipple and cars on the loading side, and stacked timber and stores.

@3dassets16.8k tris
Shaft collar and deck (Underground Mine and Shaft Works)Animated

Shaft collar and deck (Underground Mine and Shaft Works)

A concrete shaft collar with a 3.6 m by 2.4 m hoisting opening, a steel deck, guide rails in the shaft, a perimeter handrail and a named swing gate at the loading side.

@3dassets644 tris
Open rim venue waste bin (Football Soccer Stadium and Club Grounds)

Open rim venue waste bin (Football Soccer Stadium and Club Grounds)

440 mm open rim waste receptacle with a solid base and visible interior.

@3dassets288 tris
Shaft daylight rim (Cave and Crystal Caverns)

Shaft daylight rim (Cave and Crystal Caverns)

Low open stone collar around the top of a shaft.

@3dassets48 tris
Surface-piercing drive shaft (Speedboats, Powerboat Racing and Marina)Animated

Surface-piercing drive shaft (Speedboats, Powerboat Racing and Marina)

Surface-piercing drive shaft with original generic marine construction.

@3dassets1.1k tris
Shaft station cutaway review section (Underground Mine and Shaft Works)Animated

Shaft station cutaway review section (Underground Mine and Shaft Works)

A review variant of the shaft station with the east wall removed so the landing, guides, shaft sleeve and station fittings can be inspected and photographed from the side.

@3dassets924 tris
Shaft bottom station (Underground Mine and Shaft Works)

Shaft bottom station (Underground Mine and Shaft Works)

A shaft bottom station: the lined station chamber with the shaft above, the man cage on its guides and the skip loading pocket beside it; narrow gauge track running north through a cutaway review section to a battery locomotive and two ore cars; and a widened services chamber...

@3dassets13.8k tris
Open sinkhole tile (Alien Planet Plants and Terrain)

Open sinkhole tile (Alien Planet Plants and Terrain)

A solid ground slab has an actual deep central through-hole.

@3dassets2.5k tris
Shaft man cage (Underground Mine and Shaft Works)Animated

Shaft man cage (Underground Mine and Shaft Works)

A two deck steel man cage with a mesh enclosure, guide shoes, a suspension bail and rope socket, and two named swing gates on the open front.

@3dassets1.1k tris
Shaft loading pocket (Underground Mine and Shaft Works)

Shaft loading pocket (Underground Mine and Shaft Works)

A steel measuring flask on a braced frame with a lower chute, a hydraulic sector gate and a control cabinet, used to load skips at the shaft bottom.

@3dassets408 tris
Broken wall opening (Backrooms and Liminal Spaces Kit)

Broken wall opening (Backrooms and Liminal Spaces Kit)

A large irregular access opening exposes pale wall substrate.

@3dassets1.8k tris