Figure 1: A cutaway view of a small molecule. The most frequent molecular surface representations are detailed. Gray discs depict the Van der Waals volumes, the gray outer line depicts the Solvent Accessible Surface (SAS) and the continuous black line depicts the Solvent Excluded Surface (SES). The SAS (resp., SES) is the limit surface for the solvent molecule center (resp., external surface). The solvent molecule is represented as a black dashed circle.