Here are two screenshots showing similar scenes in Smooth Dirt and House respectively. As seen here, there’s a lot more light in Smooth Dirt and that limits the ability to make extremely dark locations.
I feel that Smooth Dirt should have a similar light range to Smooth Autumn (the same lighting would be preferable imo). Smooth Autumn is capable of having advanced darkness and has a good range of lighting.
I remember reporting on this. It started when the game moved from 0.8.6.0 —> 0.8.7.0
Unfortunately, it’s not just smooth dirt. Most outdoor areas (including smooth autumn) have been permeated by a blue-ness in the dark. Here’s a rough building I made in the pitchest black setting