How to hollow layers 3D models for makers?

Makers hollow 3D model layers by adjusting infill density in slicer software—reducing internal material while keeping the outer shell intact. - Use low infill percentages (10-20% is common) to cut material use and weight; slicers offer patterns (grids, hexagons) to balance strength and hollowness. - Ideal for prototypes, functional parts (e.g., brackets) where weight matters, or decorative items (e.g., vases) to save cost. - New to this? Start with default infill settings in Cura or PrusaSlicer, then tweak—increase infill if parts break, lower it if too heavy.