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vdW volume (a), (c) and vdW surface area (b), (d) calculations at different resolutions for a single hydrogen atom (a), (b) and 1000 separate, randomly scattered hydrogen atoms (c), (d) (radius 1.2 Å). Connecting lines have been added for visual clarity. Owing to the simplicity of the structure, analytical values can be easily calculated. As the grid resolution decreases, so does the voxel size, and the results converge towards the expected values.
