Reach up to the skies or dig deep below, expand your base vertically... If you're into that kind of thing. Original by Simcra, ported to 0.14-0.16 by Erdbeerbaer. Port to 0.17 started by DeltaNedas and continued by Danacus.
Your mod should listen to the script_raised_destroy event, so that it can detect when cavern walls are removed by mods
Hi, sorry for the late response, I must have missed an email or something.
It should work now, but I didn't test it. Thanks for mentioning this issue, I wasn't aware of this.