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To ensure your combined design prints correctly, it's important to make sure it is a solid, manifold model. When parts of the geometry go missing after combining objects, it might mean there are errors or non-manifold geometry present in the file.
To address this issue and prepare the file for successful 3D printing, you can try the following steps:
- Run a repair function: Use a 3D modeling software or online repair tools to check and fix any issues with the geometry.
- Check for non-manifold geometry: Look for areas where the surfaces are not closed or intersect, and fix them.
- Ensure watertightness: Make sure all surfaces are connected and form a solid volume without any gaps.
Regarding the question of whether it will print correctly if not made solid, some slicer software might have difficulty processing non-manifold or intersecting geometry, potentially leading to printing issues. It is recommended to have a solid model for better printing results.
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