I was working on an underground tunnel in some video game level editor. Was like I was making a Doom level using Doom textures, but was editing from a first person perspective, pushing and pulling the ceiling to make lots of little details, then realized that the reason everything looked a little off was because textures were misaligned when I accidentally hit a button that fixed them (everything I was doing was grid-aligned so auto-aligning worked perfectly). This also resulted in the light textures illuminating, and then everything looked good.

That had all been in the context of exploring some apartment building or a hotel or something. I think I had been looking for some for some friends when I got distracted by the digging around under it.

This was not a tunnel digging dream though. Those have a certain triumphant feel to them, as in "I finally actually dug a hole in the ground that goes somewhere!" The undergroundness was entirely positional with no physicality to it; there were no dirt or rocks. I was just horsing around in some level editor (and not in the "holy crap this game has a level editor this is rad" sense, either, which I used to have that dream about Ultima Underworld).

The digging around became more Minecraftesque when we exited the tunnel system and came home (in that the tunnel connected various settlements at different distances to our home base). This was our country home, and a big brown bear showed up outside (because that's what happens in this type of dream, apparently) so Sara and I went inside, but the cats ran out to fight the bear. I was worried about them but there was nothing I could do about it so I stopped worrying. I guess eventually the cats chased the bear off or got scared and came in. Nothing traumatic happened. 👍