The Solid 3D Male Muscular System includes all of the major muscles of skeletal movement, individually named with standard nomenclature and organized as a separate part with no interpenetration between muscles. The superficial surfaces of each muscle were created by hand using scan data of a 50th percentile (by height and weight) U.S. male as templates for construction. Origin and insertion points were carefully crafted using scan data, using the skeletal landmarks characteristic of such muscle attachments and using atlases and other published source material.
Muscles are connected to the skeleton in two ways between which customers may select. In the first connection option, the muscles extrude into the bones at the origins and insertions. Though interpenetrating geometry is often not allowed in simulations, this method results in a lighter data set that is less taxing on computer systems. The second method for muscle connections uses trims in every instance where a muscle originates or inserts with a bone. This treatment is heavier, more detailed data and as such it is more taxing for systems to process, but it maintains a more true origin and insertion system and connection of muscle to bone.