I'm an architect who would like to be able to download 3D terrain info and then bring it into AutoCAD 3D for use in renderings and animations using a couple of rendering/animation softwares called AccuRender and Lumion.
In the past, I was able to use an AutoCAD add-on software called EasySite (no longer available or supported) that could create TIN meshes from point files.
Is there an inexpensive way to download 3D terrain info that works in AutoCAD?