I definitely did not do all this today (on and off the last couple weeks), but I've started a third iteration of a procedural 3d world (and thankfully it's gotten better each time
Today I removed an artifact where faces would look disjointed.
Example (from the first iteration over three years ago!):
This would be fine if there were supposed to be sharp edges, but no visible edges fits better with the graphical style of this project.
It's amazing how much of a difference correct normals make!
Code can be found on my Github.