EPS Foam for Royal Gorge area of layout

Here are images of some of the stages of the Royal Gorge area of the layout I am creating. The foam boards needed to be cut to fit critical areas. These sections will have removable mountains when the layout needs to be transported (sometime way in the future). A hotwire was used to shape the form, a hand rasp was used to soften the surfaces that weren't supposed to be rock, an electric palm sander was used as well to really smoothen out the surface in some places that will be grassy hills. Hydrocal castings of rock will be added and patched together with Fiber Decor modeling material, painted and soil added.