 A novel clustering-based method is presented to generate alternative build orientations for laser powder bed fusion, which involves dividing facets into clusters based on similar normal vectors and then computing alternatives for each cluster before combining them to produce a final set of orientations. The method is tested with regular and free-form surface models and found to be feasible and effective, producing stable results and efficient computation. This article was authored by Yu-Chu-Chin, Chu-In-Fan-Chi, Pei-Zi-Shu, and others.