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+author: PestoVerde322
+delete-after: true
+changes:
+  - rscadd: Girders and their reinforced variant are now a smooth structure.
+  - imageadd: Replaced the outdated Walls and girders icons.
+  - code_imp: Put some order in the indestructible walls and gave them their own folder
+      (excluding the Hilbert hotel's unique turfs)
+  - bugfix: Wooden walls and Silver walls are now opaque again