Just taking a look at Dungeon Magazine on archive.org and it seems that crosshatching in walls is pretty common, at least in the early editions. https://archiv

Just taking a look at Dungeon Magazine on archive.org and it seems that crosshatching in walls is pretty common, at least in the early editions. https://archive.org/details/Dungeon_Magazine_002/page/n25/mode/2up https://archive.org/details/Dungeon_Magazine_002/page/n25/mo... https://archive.org/details/Dungeon_Magazine_002/page/n45/mode/2up https://archive.org/details/Dungeon_Magazine_002/page/n45/mo... https://archive.org/details/Dungeon_Magazine_002/page/n51/mode/2up https://archive.org/details/Dungeon_Magazine_002/page/n51/mo... https://archive.org/details/Dungeon_Magazine_003/page/n31/mode/2up https://archive.org/details/Dungeon_Magazine_003/page/n31/mo... https://archive.org/details/Dungeon_Magazine_003/page/n41/mode/2up https://archive.org/details/Dungeon_Magazine_003/page/n41/mo...