When you upload a design to our gallery, you may find that some geometric issues prevent it from being built without modifications. The most common reason is that the design does not unambiguously represent a solid object. Another possibility is that some parts are too thin to be synthesized.
Many 3D software modelling tools currently available focus on creating models for rendering and animation. Most of the time, this type of software does not require the object to be solid and only represents its surface. This information is sometimes insufficient to reconstruct a solid object solely based on the 3D design.
If possible, our software tools will attempt to automatically fix the design. However, some issues require manual editing by the designer.