overviewer/Minecraft-Overviewer — pull request #738 by Fenixin (2012-05-17 08:44:17+00:00)
Title: Smooth lighting fix.

This seems to fix black dotted lines in smooth lighting rendermode. It just turns on the checking for adjacent blocks in adjacent chunks in the lighting face occlusion.

I think it doesn't break anything but I haven't looked to overviewer's code in a few months so have a look just in case I miss something.