Fungus and Moss Not Regrowing In Caverns

[Ariostos]

I have a Fortress built on top of an Ocean Bay using a 10x10 embark, and I was hoping to move my Grazers from a Pasture, which is some distance away from the Fort, to one directly underneath within the Caverns. This worked fine at first, but I soon discovered that the Floor Fungus was not replenishing in the new Pasture, and within a year or so the Grazers had gone through their whole supply. I thought it might just need time or the Pasture needed more room for grazing land, I initially had two major Farms placed next to it that I moved to an upper level just under the Sea Floor, but still nothing is growing. On a whim I started using the DFHack 'firestarter' to seed some fires around the Caverns; none of the Underground 'Grass' ever regrew, and the only tiles that remained 'Grassed' were ones that have or initially had plants growing on them.

The only common factor I can find is that all the floor is various types of Sand; this is strange given I have seen vegetation grow on Sand on previous embarks, but I'm wondering if, because I have embarked mostly onto an Ocean and Wet Sand is present, if the game is getting confused and applying the Non-Growth on Wet Sand to ALL Sand.

I'm curious if anyone else has encountered the same issue, or knows a workaround.

[Fel]

A 10x10 embark comes with all sorts of issues, including pathfinding that will definitely break if it hasn't already.
Not sure if the underground "grass" not regrowing could be part of the issues from large embarks, it should grow just fine as long as there is mud or there is a soil floor (sand included) and it was never exposed to light (in which case normal grass would grow, assuming the biome allows for it).

[Ariostos]

Publicado originalmente por Fel:

A 10x10 embark comes with all sorts of issues, including pathfinding that will definitely break if it hasn't already.
Not sure if the underground "grass" not regrowing could be part of the issues from large embarks, it should grow just fine as long as there is mud or there is a soil floor (sand included) and it was never exposed to light (in which case normal grass would grow, assuming the biome allows for it).

The Pathfinding HAS been weird in a handful of cases, but I don't know how much of that is due to me trying to keep people off the Ocean Ice barring those times I'm putting Structures down.

There is plenty of Moss and Fungus around, it is just refusing to replenish itself. Strangely no Underlichen; the 3rd Cavern Layer has Floor Fungus instead. Mud doesn't seem to do anything as, while I had quite a bit strewn about for my Farms, when those tiles were freed up they remained barren. I suppose I should also disclose that, while my Fort is largely at Sea Level, the First Cavern Layer wasn't reached until (-96) or so; not sure how unusual that is on a Sea Embark.

[Ariostos]

So it seems that something is wrong with my Main Cavern Biomes, based on testing I made with DFHack's 'changelayer'. I changed a layer of Sand to be a layer of Loam, then seeded it with Underlichen using DFHack's 'regrass', and then burned it all with 'firestarter'; unfortunately the Underlichen refused to grow back after several months. In comparison, I dug out a a 10x10 space some layers down within Temperate Forest, with some of that reaching over into the Ocean Biome via the Beach just as an additional check; Floor Fungus almost began popping up immediately, though it was exclusively within the borders of the Temperate Forest Biome.

What is strange though is that some Cavern layers near the Surface are working fine, it is just anything connected to the Main Caverns and the Ocean Biome.