The Materials Project potential energy surface (MatPES) workflow (Fig. ) is designed to strike a good balance between low computational cost and generating high-quality energy, force and stress labels for training foundational MLIPs. It is solely intended to run static calculations at both PBE and r 2 SCAN level of theory where the PBE wavefunction is used as the initial guess to facilitate SCF convergence of the subsequent r 2 SCAN static, significantly reducing the number of electronic steps needed at the more expensive meta-GGA level. This workflow structure also permits multi-fidelity or difference learning between different levels of