Burr Stewart demonstrates how to blend the edge of a retaining wall into its surrounding scenery, using lightweight spackle, latex paint and Woodland Scenics blended turf. Between steps, he shows pictures of a variety of retaining wall examples from other model railroad layouts he has visited. For an extra bonus at the end, a pair of GP18's back out of the Interbay Engine Terminal past the new retaining wall, and exit stage right.
The HO scale model railroad featured here is Burr's "Burrlington Northern" model railroad layout, and featured in many other videos on this KZfaq channel @Burr Stewart , as well as his blog burrlingtonnorthern.blogspot.com. He took the video and photos with an iPhone X on a tripod, and edited in iMovie and Photoshop Elements using a MacBook Pro.