What aspects of a 3D model can lead to printing issues in FDM?

In Fused Deposition Modelling (FDM), several factors related to the design of a 3D model can indeed cause printing issues, and choice C highlights critical aspects that can lead to these challenges.

Complex geometries can present difficulties because they may require intricate paths for the nozzle to follow, where the printer has to navigate tight spaces and varying curvatures. This can lead to issues such as improper layer adhesion, warping, or even failures if the geometry is too intricate for the machine’s capabilities.

Acute angles may cause problems during printing as well, particularly if they are steep or sharp. During the deposition of material, the nozzle may struggle to create a consistent layer at these angles, potentially leading to overhangs that are not adequately supported. This can result in sagging or a lack of material in those areas, compromising the structural integrity of the finished part.

Thin features without support are particularly problematic because FDM relies on layers being deposited upon one another. If a thin feature is too fragile or lacks proper support structures, it may bend or collapse under its own weight or during the printing process. This lack of support can substantially impact the model's accuracy and usability.

Comparatively, complex geometries and thick features