The platform supports glb, gltf, fbx, obj formats.
We strongly recommend uploading in glb format.For gltf, fbx, obj, it is recommended to compress them into a ZIP file before uploading.
- File size limits:
• Free: 30 MB
• Starter: 50 MB
• Pro: 100 MB
• Enterprise : 100 MB
It is recommended to keep the model file size under 10 MB, ideally around 5 MB.。
A: When uploading fbx or obj, only the default materials are preserved, and textures may be lost.
For gltf, the format consists of multiple files, which makes loading less convenient.
- Single model mesh count ≤ 10, entire scene ≤ 50
Recommended: single model ≤ 5, entire scene ≤ 10
Single model triangle count ≤ 50,000, entire scene ≤ 200,000
Recommended: single model ≤ 30,000, entire scene ≤ 60,000
Model names (model, nodes, meshes) may contain letters, numbers, underscores, and hyphens only.
Chinese characters, spaces, and special characters are not supported.
- Ensure unique names for all objects in the model.
- Use quads for modeling. Triangles may be used in special cases.
- Models must be created using polygon modeling.
- The Scale must not be zero or negative.
- Place the model’s pivot point at the geometric center or bottom center, then move the pivot to the world origin (0,0,0).
- No isolated vertices.
- No duplicate vertices.
- No duplicate faces or coplanar overlapping faces.
- Normals must be correct.
- Remove all unused objects (empty nodes, hidden objects, helper objects, etc.).
Reset all model transformations:
- Scale = 1
- Rotation = 0
- Position = 0
- Avoid creating poles unless absolutely necessary.
- Maintain clean and reasonable topology (consistent, well-organized edge flow).
- For assets containing transparent components, use separate meshes and materials for transparent and opaque parts to achieve better rendering results.
- Reset all transform data, construction history, and modifier stacks to avoid export inconsistencies.
- It is recommended to keep the model at real-world scale.
What is an isolated vertex and how to fix it?
What is a doubled faces and how to avoid it?
- The model should have no visible texture stretching.
- UV seams should be placed in less visible areas of the model.
- No UV overlaps.
- Flatten the UV islands as much as possible and make full use of the texture space.
- Multiple UV sets are not supported at the moment.
- Tiled / repeating textures are not supported.
- Single model material count ≤ 10, entire scene ≤ 40
Recommended: single model ≤ 5, entire scene ≤ 10 - Single model texture count ≤ 10, entire scene ≤ 40
Recommended: single model ≤ 5, entire scene ≤ 10 - Material and texture names may contain letters, numbers, underscores, and hyphens only.
Chinese characters, spaces, and special characters are not supported. - Ensure unique names for all materials and textures.
- Supported texture formats: png, jpg, jpeg
- Maximum texture size: 2048 × 2048
Recommended sizes are power-of-two textures:
2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048 - It is recommended to compress textures using image compression tools.
- Supports PBR materials (Metallic–Roughness and Specular–Glossiness workflows)
- Supports Unlit materials
- Single model animation count ≤ 10, entire scene ≤ 40
Recommended: single model ≤ 5, entire scene ≤ 10
Single model bone count ≤ 80, entire scene ≤ 160
Recommended: single model ≤ 60, entire scene ≤ 120
Single model morph target count ≤ 50, entire scene ≤ 100
Recommended: single model ≤ 30, entire scene ≤ 60
Names for bones, morph targets, and animations may contain letters, numbers, underscores, and hyphens only.
Chinese characters, spaces, and special characters are not supported.
- Ensure unique names for all animations, morph targets, and bones.
Supports Transform animations, Skeletal animations, and Morph animations.
Vertex animations are currently not supported.
Blender 3.0+ has known issues exporting morph animations;
Blender 2.9 is recommended for stable export.
Maximum bone influences per vertex ≤ 4
(i.e., each vertex may be affected by up to 4 bones in skinning)
- Recommended animation framerate: 30 FPS
- During animation creation, mesh and bones must not be scaled to zero or negative values.
- Do not name any bone “root”.
The top-level root bone must not contain animation.
If animation exists on the root bone, you must create an additional empty parent bone and make the animated bone a child of it.
