Not sure why? On factorio build 1.1.26, caves 1.0.0, and cave configuration 1.0.0.

I did upload this mod to a server that was already generated. Server had many mods, including your surfaces_reloaded. Removed reloaded, and your new surfaces packs.

Random other question - are we expected to be able to mine the walls in caves? Doesn't look like I can do that either.

Not sure why? On factorio build 1.1.26, caves 1.0.0, and cave configuration 1.0.0.

I did upload this mod to a server that was already generated. Server had many mods, including your surfaces_reloaded. Removed reloaded, and your new surfaces packs.

Random other question - are we expected to be able to mine the walls in caves? Doesn't look like I can do that either.

https://gyazo.com/09329ba4f19f630ce1f7f3e0a4641b2b

So the caves are not generating on a modded world? Could you tell me which mods you are using or send a save file. If I cannot reproduce this issue, I cannot help you.

Also, I never really mentioned this, but there is no migration or backwards compatibility with Surfaces_Reloaded.

So the caves generated technically, but are vast and empty (I think this is expected?). But I can't mine walls, and the mini map/expanded map doesn't work as expected (see linked screenshots).
https://gyazo.com/b51a0f62223cc2718a50e035c949681f
https://gyazo.com/49c10f39dde78bee8a28d4dd0345a6ed

There's uh, quite a bit of mods on this server lol. I expect it's an incapability somewhere if these are expected results (I guess I'm just unsure if they are or not).
I've uploaded the saves/mods here you can take a look (not all downloaded are enabled fyi).
https://drive.google.com/drive/folders/1_dVE622ti7d5mR8UqUH0T3O8mzKNyZVv?usp=sharing

Also, I never really mentioned this, but there is no migration or backwards compatibility with Surfaces_Reloaded.

Not sure what you mean here. Are you saying you don't expect users to be able to load between the two on the same save? I wondered about this, but wasn't sure when the caves were generated.

The mod is working as expected. You can mine caves with cave explosives, it works like landfill. You do need explosives to craft it though. (can be changed if that bothers you)

The minimap is not showing anything by design and the caves were supposed to be darker, I must've changed that at some point. I added it with the idea that you would have to explore the caves instead of "cheating" with the minimap or by zooming out. These features are probably not for everyone, so I'll add options to toggle these features.

There don't appear to be any compatibility problems with the mods you are using.

Are you saying you don't expect users to be able to load between the two on the same save?

What I mean is that you can (probably) use both, but all the surfaces are separate. Your existing factories on other surfaces will not be transferred to the new surfaces. There's probably a way to do it, but I just didn't want to spend time on it.

I'll publish a small update today that allows you to toggle the map and the darkness.

Update is ready