Am I missing something or is there no way to create voids in dynamo geometry. I know I can create voids as Form.ByLoftCrossSections and using a false Boolean within revit. But if I want to manipulate geometry I’m working with in the dynamo engine how would I do this? So as an example I’ve produced a Polysurface.BySweep and now want to void bits of this geometry out according to other parameters I’ve set. Once happy with the outcome I will then use the ImportInstance.ByGeometry node to view the result within the Revit window as I currently don’t need native Revit elements as such.
hi!
maybe that is what you are looking for.
don’t forget to turn of the preview of the base geometries 
perfect Solid.Difference was the node I was after. thanks
Hi Peter.
Can i get these images in full size? I cant see what you have done there. I am stuck in the same problem as mark is
unfortunately no!
it is 5 years since the post and i do not keep pics that long
sry
peter