When a human being sits down, our bodies compress and spreads slightly in contact with a surface. This is true at every weight and level of musculature. Nobody’s legs naturally clip through furniture.
You can achieve a more realistic look of compression with this set of 30 morphs for the buttocks and legs. The butt and thigh morphs include both separate and combined versions to support different sitting poses, and the shin morphs include inside and outside variations.
The morphs also include tilt forward and backward modifiers for the thigh and butt morphs to account for situations where a person is not sitting completely flat.