I've got several mods installed, and now it seems this mod doesn't work at all. I can't place walls, gates, mines, or poles on water. I've enabled all the settings in the startup mod config, but nothing works. I've got nothing that would seem to conflict with WFW, do you know of any conflicts?

This mod currently only allows you to place stuff on shallow water (water tiles in the game that you and biters can walk over). They only naturally appear in mods that change the world generation, or on other planets in the Space Age DLC.

If you are trying to place walls on shallow water/marsh and it’s still not working, can you give me a list of the mods you are using right now?

If you want me to add a setting to allow stuff to be placed on deep water, let me know!

Yeah I was trying to place the items on shallow water, so that's not the issue. Here's my current mod list https://cdn.discordapp.com/attachments/951083518446936075/1524442035996590175/image.png?ex=6a4fc2c8&is=6a4e7148&hm=9f030d0933fb950b376006fc461a011ffa1e1e570c18dee3e28c15c672cee70e

I've already tried deactivating Canal Excavator, and it still doesn't work, so the conflict is almost certainly not there.

Weird thing is that it seems to be working on my end.
I've installed every mod you have in the screenshot (except for the 'Item Request Proxy Events' mod, I could not find that one anywhere), all with default settings.

This mod allowed me to place walls and gates on shallow water and marsh, which are the only water tiles in the base game that can be walked on too.
However it did not let me place walls and gates on regular water, which is normal.

You cannot find shallow water and marsh in the default nauvis world generation, from what I know, these mods change that:
https://mods.factorio.com/mod/the_shallows_updated
https://mods.factorio.com/mod/alien-biomes

PLEASE let me know if you're seeing something different and I will do my best to investigate the issue. Footage and lots of information definitely helps!

If you want me to make a feature which allows you to place walls on any water tile in the game, that is something I can do.

Me trying to replicate the issue:
https://cdn.discordapp.com/attachments/1217664166064816188/1524467396570779768/Factorio_-_2026-07-09_3-25-43_AM.mp4?ex=6a4fda66&is=6a4e88e6&hm=906e302fc574e996aae481cfcd4beda7e8895beac1d604f229f63382193e742a&

(It's currently 3:42AM for me atm but I will be happy to help once I wake up)

Oh, I might see the issue. I must've been wrong about what shallow water is. I assumed it was the coastal water tiles on Nauvis, the ones colored in light blue on the map, but if you're right that they don't generate by default, then that's my issue. I hadn't reached Gleba yet, so I couldn't test it there. But now I've checked in editor, and it does seem to work just as advertised. That's my fault, sorry for taking your time.

That said, I'd love an option to let us place walls and poles on the light blue water tiles on Nauvis. It just fits. It feels... right.

No worries! I can see how the two can get mixed up.

I’m working on the new feature atm.

Okay! You can now place walls on any water tile in the base game (+DLC) with this setting (as of 2.1.2/2.0.10):

You will have to change the setting from its default for it to work.

You're a life-saver. Thank you!

Happy to help!