Oh my goodness, thank you! I'm so new here, I keep seeing things about the Atlas and figured I would read up on it once I felt more up to speed. I will start looking into it.

I tweaked it to change the effluent on Level 3 to Effluent o3, then changed it after the first Gelatinous Cube in the Waste Filtration Path to clear water with decreasing amounts of scum as it gets purified. Added some clear water near the cubes in the Filtration Auditoriums to show that they ate some of the contaminants as they were traveling through. Also added some floor stains.

I think this makes it a bit clearer that the Gelatinous Cubes are consuming the waste and purifying the water. I will go through add more scum to the floors and the effluent in Levels 2 and 3.

I m so happy Ralf did that video. I learned so much, and it really gave me confidence that I would be able to make my maps the way I want without having to trace coastlines. This is really beautiful. I’m going to have to try out the Pete Fenton style.

(I just noticed that this looks vaguely like the Starship Enterprise.)

In Level 5, purified water from Level 4 hits at a high spot that slopes both to the west and to the east. Water that flows to the west will reach the end of the canal and be deposited into water pipes that take it out to sea. Water that flows east will end up in a supersized drainage canal to help carry refuse from the bottom of the Great Maw.

The Great Maw ends at this level. All manner of waste digestible by the Black Pudding is tossed in here, including unusable metal and wooden objects, as well as any bones picked clean by the Gelatinous Cubes in Level 3. Here, the Black Pudding is munching on a great bell that has been thrown away, as well as some broken furniture. (Yeah, townfolk would probably chop up the broken furniture for firewood, but I wanted to show the Pudding eating metal and wood.) Left untouched for daring adventurers: a ceramic urn and a stone statue that are indigestible, along with some glass bottles. There’s also a staff, book, and scroll case that should be edible…unless they’re magical.

An extra large canal brings any remaining wastewater to the sea. Here, a Voracious Sullage has stretched itself across the canal, holding on to two side pillars as it scoops up anything edible remaining in the water.

A portion of the Great Maw’s wall has broken down, revealing a few caverns that are home to a strange tentacle aberration.

If adventurers survive the Black Pudding, the tentacle aberration, and the carnivorous plants down the passageway, they might find an escape route through the southern passage. But they might not be home free: something got the last adventurers who rested here (though that something might have been carbon monoxide poisoning if they lit a campfire in this poorly ventilated space).

Level 1 primarily collects water from storm drains along with leaves and vegetation that might get swept in. Manure from horses on the street and domesticated animals are often shoveled into these storm drains as well. These drain into chutes that flow into Level 2.

Maintenance workers can enter this level through a staircase near the Great Maw that descends to a maintenance room, where a great seat of stone doors allows them to dump refuse into the giant pit. Luminescent crystals on the pit side of these great doors helps keep the Black Pudding from ascending this far. A spiral staircase in this room ascends to the surface and descends to Level 2.

Each intersection that has a stormwater drain also has a manhole that allows maintenance workers to climb down. These storm drains do not connect to one another, and maintenance workers who want to traverse the system will have to continue down ladders to Level 2.

Still to come: I want to work on the labels more, and I may add some of the rocky texture to outline the storm drains.