If you want to get the hex grid you must slice it on slic3r with this settings: layer height: 0.2mm Solid layers: top: 0 bottom: 1 (or 2) Infill: Fill density: 0.3 Fill pattern: honeycomb Fill angle: 45º If you slice it on Cura you'll get an square grid: Bottom/Top thickness (mm): 0.2 (or 0.4) Fill density (%): 30 ...Infill: Disable "Solid infill top" Enable "Solid infill bottom" Infill overlap (%) 15