If you knew someone with Vectorworks, you could have them export to CAD, and then import that CAD into Rhino (hopefully it works - best to import into a blank file and not a file that’s dear to you). This option allows you to specify the folders in which AutoCAD should look for the custom hatch pattern. Next, click on the Files tab and select + button beside the Support File Search Path option. PAT files I believe and has many hatches not included with AutoCAD. To do this, right-click any open area within the AutoCAD model space and select Options. There are a few different ways to get a hold of a ‘.PAT’ file, it doesn’t have to be straight from AutoCAD necessarily (small chance I could be wrong here). If it’s complex, you’ll have to dig something up on an internet search. My advice would be that if your hatch pattern is very simple (just lines) you can create it yourself. It looks super useful… too good to be free… there must be some catch? There’s a website called … but I want to express a caveat that I have never downloaded anything from that site. The attached image shows a couple hatch patterns I made (for Revit actually, hence one for each angle there were ways around that even but I’m risking going off on a tangent here).
Creating a custom hatch definition in an AutoCAD. Chiming in more as an AutoCAD expert here.
