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Non-solid blocks don't show up on maps if the block below isn't solid

Solid/opaque redstone components act differently from normal solid/opaque blocks

Ladders can be placed on transparent blocks if a solid block is nearby

Beds without solid block below do not appear on maps

Zombies can destroy turtle eggs through a full block and a half above the egg

Sometimes light passes through solid blocks and beds do not match

Chickens suffocate if jumping while under a solid block