A new study reveals the critical impact of laser beam shift on the geometric accuracy of LPBF-fabricated TPMS lattice structures. Conducted by Ibrahim H. ZainElabdeen et al. and published in the 2026 journal *Additive Manufacturing*, the research used Inconel 718 to fabricate Primitive, Gyroid, and Diamond TPMS structures. By adjusting the laser beam shift between over-melting and under-melting conditions, relative density deviations ranged from +64% to -20%. Among them, the Diamond structure was the most sensitive with the largest deviation range. X-ray computed tomography and compression test results indicate that the beam shift, laser power, and scanning speed must be co-optimized. Current research on geometric control of thin-walled TPMS structures in metal additive manufacturing remains insufficient. Traditional methods often focus on adjusting laser parameters to control strut diameter, neglecting the key role of beam shift. This study fills that gap and offers a novel perspective for process optimization. Specifically, it identifies laser beam shift as a first-order geometric control variable in the LPBF process, enabling the actual geometry of fabricated parts to actively match design values without altering thermal process parameters. This finding not only helps explain inconsistencies in mechanical property data in the literature but also provides a practical control strategy for manufacturing high-performance lattice structures.