The Base8 Standard is a set of building and color scheme standards for putting together large castle themed displays. It incorporates elements from the Classic Castle City standard, Ben Ellermanís farm standard, and the BPB standard (in fact, any modules built for the above three standards can be converted to Base8 with very little effort). The modular nature of the standard makes it very flexible; it can be constantly expanded as more contributors are added to a project and even the person with the smallest collection can contribute as long as they can produce 8x8 studs worth of terrain.
The idea of Base8 came about during the discussion of the farm standard on CC.com. Basically, all modules within the standard are defined in 8 stud wide sections. If, for example, you are building a road across a 32x32 baseplate, your road should be 8 studs wide when it meets an edge, and should meet the edge at a point that is a multiple of 8 studs from the corners. Everything defined in the standard; cliffs, walls, shorelines, etc., should be built in 8x8 sections, or “8cres.” This means that any baseplate that’s edges are multiples of 8 studs wide (8x16, 16x32, 32x32, etc) can be incorporated into a display, even vignettes.
The term BPB is used occasionally by the author in this article. BPB refers to the technique of raising the base ground level of your baseplates so that rivers and lakes can be built lower than ground level, a much more natural and better looking approach. The downside of BPB is that it adds significantly to the complexity of a display. The choice to use BPB should be in the hands of the coordinator; the following Base8 modules can be constructed either way. To learn more about BPB, go here.