I'm requesting a conceptually simple mod, that would trigger a block update (and, if it's a separate function, lighting update) for every block in a chunk right after that chunk finishes generating and populating. Maybe 1 tick after, just in case. Maybe it could be every other block, since a block update also seems to make the neighboring blocks update themselves.
The idea is to not have to walk around punching airborne sand, or flying up close to a glowstone formation that erroneously isn't casting any light or a bizarre pitch-black shadow on a cliffside, and instead to force the world to settle into its proper state all on its own without player intervention. I'd also hope it might fix the lighting problem where if I use a mod (Custom Ore Gen) to replace lava with stone, the nearby blocks are still lit up as if the lava was there.
Sure, I'm guessing it will be severely laggy, but I'm curious to see if it even works. If so, it could be used to pre-generate a world, after all.
I am also interested in a mod that would force the update of all blocks in a range of chunks or during the generation process. Even if it cause massive lags because it will only use during pre-generation process or by an admin when there no player on the server. The process can take one hour or more to update all chunks, it's not a problem