Updated 11/23/2019:
I’ve been struggling with the hillside surrounding the C & P tunnel portal on the Steubenville side of the river. Shaping it correctly – a balance of reasonable slope (no cliffs) and coverage of all the white space left by the backdrop – has been a challenge. Ultimately, there will be some white space and I am going to paint that in earth / tree tones (green, ochre, umber). Here's the first few layers.
I have also struggled with vertical and horizontal layering of the Styrofoam. Mixing them has been a problem of my own making. I have solved that now (I think), by using all horizontal layers. The face of the tunnel portal and its slope back to the higher benchwork has been mostly a 3-D visioning problem for me. But now I have that in hand; I need to make a number of ½” layers to contour the slope correctly.
We've still got some contouring work to do but I'm much happier with this. There will be a slope above the tunnel portal (to the right of the bridge). I am planning on using the Great Stuff foam / quilt batting method to create the final shapes.
George