To start, we 3D-printed LSCs in regular geometries (square, hexagon, triangle, circle) using fused-deposition modeling with custom filament of LR305-PMMA that was extruded inhouse. Note that while the dimensions are identical in 3D-printed or bulk cast designs, the FDM process introduces internal surfaces into the LSC slab due to the method by which the part is manufactured (see Figure vs. 2c for comparison). We want to understand the effect that these differences in manufacturing (and thus internal slab structure) have on the LSC performance.