I swear, I genuinely thought I was losing my mind. I thought my computer was trying to gaslight me. I think I figured out what's going on, but I still have questions.

(TL;dr note: most of this is a longwinded explanation but the actual question is in the final paragraph.)

As I mentioned in a previous thread about creating barrel roofs, I am working on creating a castle or fortress inspired by the architecture of the Armory in San Francisco. Often when I am embarking on a new project, I start with a test file to experiment with drawing techniques, fill styles and scaling, and sheet effects. That way when I decide on what I want to do, my actual file won't be cluttered with extra fills that I imported and then decided not to use.

One of the things that I thought (incorrectly) was cool about the CA149 Beaumaris Castle when I was creating test designs was that the fills for the floors and the walls had two versions for the fills, allowing me to set different scalings for them. For example, I might use one scaling for the exterior fortification walls and a smaller scaling for the interior walls. (Separate question: is that a terrible idea, visually, to have interior and exterior walls with different scaling with the same or similar fill?) Here's a mockup where I had different scaling for the granite floor tiles, wall sections, and wall top.

But then when I looked at the folder on my computer for Bitmaps - Tiles - Castles, it only had one fill for each of the floors and the walls (e.g., one for the granite floors, one for the limestone floors, etc.).

And when I looked at the FCW file in CA149, it also only had one fill for each:

...unlike my test file that had two for each, like "Floor - granite Bitmap" and "Floor - grant SMC":

So here's what I think I did. I think in my test file, when I was importing a bunch of fills to experiment with, I copied in one of the Beaumaris Castle FCW files, but then I also imported the fills from Bitmaps - Tiles - Castle. (Why would I import both? Lord only knows. I was importing so many different things from DD3, Mike Schley, etc. that I probably forgot I had already imported one.) The fills in the Beaumaris FCW files are the ones with "SMC" in the name, and I guess that when the annual was created, they were tweaked or something, and renamed?

(I didn't figure any of this out until I was in the process of making screen captures to ask the community what was going on.)

So here's my question: if I were to use a copy of the Beaumaris FCW file as a template (because I like the sheets that are already set up), are the SMC-labeled fills shareable, like if I were to submit my completed castle to the Atlas? From a sharable perspective, could I use both the ones labeled Bitmap and the ones labeled SMC? (And from an aesthetic perspective, which is not my strength, is it a terrible idea to use both with different scaling?). Or should I only use the ones labeled "Bitmap"?