What is sand3d used for?

sand3d is used to describe and build 3D objects through short Python programs over Blender's bpy API. Its operations cover geometry, edits, frames, joints, and assemblies, making it relevant to LLM-driven modeling and articulated object workflows.

The supplied information lists sand3d as free and identifies the library's license as Apache-2.0. The accompanying dataset programs are described separately as CC BY 4.0, so users should review the applicable license for each component.

Does sand3d generate 3D models directly from text prompts?

sand3d is a modeling library designed for use with LLMs, not a standalone text-to-3D model in the supplied description. An LLM can be used to write programs against its API, and those programs define the 3D objects.

Which file formats does sand3d export?

The supplied documentation lists GLB, URDF, USDA, OBJ, and STL exports through one export call. Exported lengths are in metres, while the introductory program uses millimetres by default.

What does the sand3d dataset contain?

Sandflow describes it as a 100K 3D-as-code dataset drawing from Objaverse, CAD, Articraft, NVIDIA SimReady, and AutoMate sources. The supplied figures include more than 10K articulated objects and 36K joints.

Can sand3d be used commercially?

The library is identified as Apache-2.0, while the supplied README and press-release information place the Hugging Face programs under CC BY 4.0. The cited press release explicitly says commercial use is allowed, but users should check attribution requirements and any applicable source-asset terms.

Last updated: 11/9/2026Last verified: 2026-11-08

sand3d: LLM-Friendly 3D Modeling as Python Code

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Apache-2.0 Python library for writing 3D objects as short programs over Blender bpy—profiles, solids, edits, frames, joints, and assemblies—built for LLMs. Sandflow presents a 100K 3D-as-code dataset written in it (67K Objaverse, 24K CAD, 9.2K Articraft, 2.3K NVIDIA SimReady, 3.1K AutoMate; 10K+ articulated objects and 36K joints); the README and the 5 November 2026 press release put the Hugging Face programs under CC BY 4.0, and the press release says commercial use is allowed.

Free

What is sand3d?

sand3d is an Apache-2.0 Python library for describing 3D objects as short programs built on Blender's bpy API. Designed for LLM workflows, it provides operations for profiles, solids, edits, frames, joints, and assemblies through a flat s3d interface. Sandflow also presents an accompanying dataset described as 100K 3D-as-code programs, including CAD assets and articulated objects. It is a programming library rather than a standalone conversational 3D generator.

Key Features

Python-based modeling: Install with pip install sand3d and import the library with import sand3d as s3d.
Compact API for LLM prompts: The documentation describes 70 public names and an API representation of 3,643 tokens, designed to fit into a prompt.
Structured geometry: Build objects using profiles, solids, edits, frames, joints, and assemblies.
Named geometry: Refer to parts, edges, and faces by name when expressing model structure and edits.
Deterministic generation: The supplied documentation states that the same program builds the same mesh, bit for bit.
Multiple export formats: Use one export call to write GLB, URDF, USDA, OBJ, or STL, with exported lengths in metres.
Unit conventions: The introductory program uses millimetres by default, while exports use metres.
Companion dataset: Sandflow reports 100K 3D-as-code programs spanning Objaverse, CAD, Articraft, NVIDIA SimReady, and AutoMate sources, with more than 10K articulated objects and 36K joints.

Best For

Developers building LLM workflows that generate editable Python programs for 3D objects.Researchers studying code-based 3D generation and articulated object representations.Blender users who prefer programmatic construction and named geometry.Robotics and simulation developers preparing articulated assemblies for formats such as URDF or USDA.Teams that need to export programmatically constructed geometry to several common 3D formats.

Pricing

The Python library is free under Apache-2.0. The official README labels the Sand3D programs on Hugging Face CC BY 4.0, and the 5 November 2026 press release states commercial use is allowed. This does not establish identical licensing for every underlying source asset; check each dataset, attribution requirements and source-asset terms.

Pros & Cons

Pros

A compact, flat API is explicitly designed to be included in LLM prompts.
Code-based object definitions can support inspection, revision, and version control.
Named parts, edges, and faces provide explicit references within modeling programs.
Includes joints and assemblies alongside basic geometry operations.
Supports five export formats through a single export interface.
The library is available under the permissive Apache-2.0 license.

Cons

Requires working with Python and Blender's bpy ecosystem rather than a standalone no-code interface.
The supplied information does not establish a built-in text-to-3D model or hosted generation service.
Different modeling and export unit conventions require attention when integrating assets into other workflows.
The library's Apache-2.0 license should not be confused with the dataset programs' stated CC BY 4.0 license.
This overview is based on official documentation; no hands-on modeling, performance or downstream compatibility tests were performed.
The official page describes 100K objects, but its source labels (67K, 24K, 9.2K, 2.3K and 3.1K) sum to about 105.6K. The counting basis is not explained; these are attributed marketing figures, not an independently verified exact total.

FAQ

Details

Platform

LinuxmacOS

Features

Short Python programs for profiles, solids, edits, frames, joints, and assemblies over Blender bpy (`pip install sand3d`, `import sand3d as s3d`)
Named parts, edges, and faces; the same program builds the same mesh, bit for bit
One export call for GLB, URDF, USDA, OBJ, or STL, with lengths in metres; the first program uses millimetres by default
Docs state the whole API is 3,643 tokens and 70 public names on one flat s3d. surface, written to paste into a prompt

Languages

Known limitations

Python 3.13 (recommended) or 3.11. The README says bpy has no wheel for Python 3.12, nor for Intel Macs from bpy 5.2 on (use Python 3.11 there). Docs pair bpy 5.2 LTS with Python 3.13 and bpy 4.5 LTS with Python 3.11; the published CI job runs bpy 5.2 on Ubuntu 24.04
A code library plus datasets, not a hosted text-to-3D generator. The 5 November 2026 press release says Sandflow will release its first 3D foundation model in mid-December
Samples on sandflow.ai/sand3d use `import sky3d as s3d`. The README and docs install `sand3d` and use `import sand3d as s3d`
The docs, README, and product page are in English. No Windows install path is stated