Bone animations incompatibility with Dora: Consider converting the bone animations to vertex animations or use an intermediary software or plugin that can help make the conversion suitable for Dora.

Missing or incorrect keyframes: Double-check the animation in 3d software before exporting. Ensure that all keyframes are set correctly. Consider baking the animation to ensure continuity in the keyframes. When using Blender, always remember to thoroughly review and select the appropriate options and bake all option in the export panel.

Incorrect glTF import: Ensure that the importing software or platform supports the glTF version you're using. Update the software/platform or use a converter.

Invisible location: Reset the model's position to the scene's origin point. This ensures it's not being placed outside the visible area.

Broken model construction: Inspect the model in 3d software using different view modes like wireframe. Check for any non-manifold edges, overlapping vertices, or other anomalies.

Incorrect export: Double-check export settings. In Blender, ensure the appropriate options are selected and no necessary data is excluded.

Missing textures or materials in glTF/glb: When exporting, ensure you're embedding or packing all necessary textures and materials with the glTF file. Also, make sure they are baked and saved in the right path.

Incorrect texture paths or missing files: Check the file paths in the glTF file. Make sure all texture files are in the correct location. If unsure, try using a simple color material to see if the model appears correctly.

High polygon count: For models with a high polygon count, it's crucial to optimize by reducing the number of polyfaces as much as possible without significantly affecting the model's detail. In Blender, you can employ the Decimate modifier to efficiently lower the polygon count. Aim to adhere to the industry standard by keeping your models under 100,000 polygons. However, for web-based renderers like Dora, it's advisable to aim for fewer than 10,000 polygons to ensure smooth performance and quick loading times.

Unnecessary data in glTF: Ensure you're only exporting what's needed. Clean up the 3d file by removing any unused data blocks, animations, or materials before exporting.

Incorrect normals: For issues with incorrect normals, you'll need to flip the offending faces to ensure they are oriented correctly. In Blender, this can be done by entering Edit Mode and enabling backface culling to identify the faces with inverted normals. Then, select all the vertices and use the "Recalculate Normals" function (Shift + N) to make all normals face outward. This step is not only crucial for correct lighting and shading but can also resolve certain problems with materials appearing broken.

Mismatched units: Check the unit settings in both your 3d software and the Dora renderer. Make sure they're consistent. Adjust the scale during export if necessary.

Incorrect coordinates during export: Reset the model's position and scale in your 3d software before exporting. Ensure the origin point is set correctly.

File Check

Import into glTF Validator/three.js to check if there are errors in the glTF file.