Oh! I see! Smart!

+ generic items ONLY (should always be available in every campaign map, no missing walls etc.)

Usually important when placing in campaign maps, since rarely the other decoration types (spooky, western etc.) are always available.
It's not a big deal if a few props are missing as long as no structures are missing.
But the contest entry relies heavily on fantasy structures AND props. If those aren't available the visual quality is suffering. Hence this version for campaign play :-)

I don't understand the difference?
https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=1828951758&searchtext=