https://forums.autodesk.com/t5/dynamic-blocks-forum/3d-dynamic-block/m-p/7817084#M27318 Hi,<BR /><BR />I used surfaces mainly. Surfaces can be associated with lines and the lines<BR />in turn can be driven the dimensions. The extrusion or revolution of the<BR />line or polyline can be driven with a parameter.<BR /><BR />I started by creating the 2d block, then began adding the 3D components to<BR />it and working out how to construct the 3D from the parameters that I had a<BR />play with.<BR /><BR />I hope that helps.<BR /> Wed, 28 Feb 2018 18:55:43 GMT Anonymous 2018-02-28T18:55:43Z