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"You know a thing or two about the wild plants of the land, and can see and pick a lot of them if you find them. Increasing your "Perception" and "Exploration" values will help you find more Foregables."
This skill uses Perception and Exploration to be able to see various plants, herbs, roots and berries that you can pick. This Skill also allows you to raid ant hills.
All herbs, sometimes referred to as forageables, grow on the natural ground of nearly all biomes and terrains, but are invisible to the untrained eye. You need to be able to see and identify a forageable to be able to pick it.
The requirement for being able to see an herb is sometimes referred to as the herb's PER*EXP score, on account of the score's value being determined by multiplying your Perception by your Exploration.
If you do not meet the PER*EXP score of an herb, it is invisible to you. They do still exist, and anyone else with sufficient PER*EXP can pick them, which to you will look like them grabbing an item out of thin air.
All forageables have a minimum, base, and maximum PER*EXP score.
The minimum score is half of the base score, and is the score at which you have any chance at seeing the herb.The maximum score is the score at which you will always see every possible occurence of the herb.
The calculation of whether or not you are capable of seeing an herb is simple. Multiple your Perception by your Exploration. If that is equal to at least half of a forageable's base PER*EXP score, it is possible to find the herb with enough searching.
For example, we want to pick some Rustroots and some Tangled Brambles, and have 20 Perception and 30 Exploration. Rustroot's base PER*EXP score is 1000, meaning we will need at least 500 to at least be capable of seeing it, and Tangled Bramble's base PER*EXP score is 560, meaning we will need at least 280 to see those. So let's find our PER*EXP score:
Now we know we have 600 PER*EXP score, which is naturally just a bit higher than 500 and 560, and thus we have the ability to see a small amount of all available Rustroots and many available Tangled Brambles.
Now, imagine we eat some Fishwraps and level up our Exploration and now have 40 Perception and 40 Exploration. Our new PER*EXP score would be:
At 1600 PER*EXP we are well beyond Rustroot's base 1000 and thus we will see almost all of those. We are also well beyond 1120, which is double Tangled Bramble's base score of 560, meaning we are guaranteed to see all Tangled Brambles possible.
Notes
All herbs also have a varying rarity. Bloated Boletes are much rarer than Stinging Nettle and you will find far less of them even if you meet the maximum PER*EXP score of both forageables.
The quality of the herbs is based on their quality nodes which are different for each herb. When picking up herbs their quality will be Hardcapped by the gatherer's Survival skill.
It appears that whether a forageable item is visible is calculated the moment it gets inside your sight range, and it's random with the chance depending on your Exploration * Perception value. It is possible that item becomes visible, and then "disappears" when you move out of sight range and come back. It simply means that you were less lucky with RNG the second time you came within range of the item, and it may appear again if you move away from sight range and come back. In other words - it seems that items don't have specific difficulty value set at spawn time, and instead it's randomly generated (ranging from base value to 4 * base value) separately for each character, each time it comes within range.
There once existed a system that distributed rare forageables in an unknown way known only as the Fate system. That system was removed when World 8 was destroyed and World 9 began, so do pretend it was never there.
Table of Perception x Exploration collectables
The following table refers to the "levels" at which forageables are visible. There appear to be 100 levels of gradiation between the "First Seen" and "All Seen" levels, but this is unconfirmed.
