This section is organized as follows. Section 2.1 briefly reviews the image-dependent pair potential (IDPP) and discusses factors that cause IDPP to generate undesired high-energy paths. Section 2.2 proposes a novel structure-based potential energy. Section 2.3 overviews the MaxFlux method 10,11 and the recently developed direct MaxFlux method, 9 explaining why the proposed potential energy and MaxFlux method are a good combination. Finally, Section 2.4 discusses from a theoretical perspective how the proposed potential energy overcomes IDPP's limitations.