What is "negative space" in FDM design?

"Negative space" in Fused Deposition Modelling (FDM) design refers to the voids or empty spaces within a 3D model. This concept is crucial in understanding how the design will behave during the printing process, particularly concerning the need for support structures. When a model has significant negative space, it can affect how the print is supported and stabilized during the layering process. For instance, overhangs often require additional support to prevent sagging or collapse, and the presence of voids influences the printer's ability to create the object accurately. Thus, recognizing and effectively managing negative space is essential for successful FDM printing, ensuring that the final print matches the intended design without issues related to structural integrity and support.