Kingjohn -

Features are built from sketches or primitive shapes to create a solid body.

Is "kingjohn" perhaps a you're researching? Introduction to Feature-Based Solids Modeling kingjohn

Are you asking about a specific regarding King John's reign? Features are built from sketches or primitive shapes

If you are asking about the primary "solid feature" (defining characteristic) of (reigned 1199–1216), historians often point to his role in the creation of the Magna Carta . kingjohn

Examples include extrusions, revolves, sweeps, and lofts.