I have done a site model of a terrain. When I insert a "Hardscape" object from level zero, I would expect the Volume of the site model (of the terrain) would minus the volume occupied by the hardscape object. Yet this is not the case. See attached 2 images.
I have also tried with the site modifier with Pad with retaining edge. But For some reason, I cannot get the pad to have clean laser-like cut edges from the contours nearby, instead I get a regrading which I don't want, any help please?. I understand I can use a grade limits but with the offset, I would loose the accuracy of the amount of cut.
Any help would be much appreciated!
Brian