I got a question from one of my blog readers which lead me to do some investigation into Renovation Filters.
So you can use the renovation override styles in the renovation filters options to set new elements to a hatch (say CMU). Unfortunately all filled windows would show that hatch, whether it's in a CMU wall or not. However the override style only works in walls with vectoral fills, symbol fills, or composite structures that don't contain solid fills. Walls drawn with solid fills or composite structures with solid fills are unaffected by the override style. See the attached image.
Shells and roofs have the same weirdness, except composite structures work if there's at least one non-solid fill skin.
Is this a glitch or a cool feature? Seems like it could be both, but probably a glitch. Before I start sharing cool tricks derived from this on the blog, I figured I should solicit some opinions.