This video shows you a topology optimization with FreeCAD, CalculiX and beso. I thought i'd video this down because beso, despite working well, has no GUI integration at all and its documentation is a bit scarce. So here are the missing links that make everything work together.

https://github.com/calculix/beso

Music: Minor Jumps, Major Cats - Eventual Consistency [CC-BY 4.0]