Pertam has practically no mushrooms

I started looking into this after a few people mentioned they cannot find mushrooms on Pertam even though it's supposed to, PhysicalModelCollections.sbc:

<Definition xsi:type="VR.PhysicalModelCollectionDefinition">
  <Id>
    <TypeId>PhysicalModelCollectionDefinition</TypeId>
    <SubtypeId>PertamForageables</SubtypeId>
  </Id>
  <Items>
    <Item TypeId="ForageableDefinition" SubtypeId="FruitPlant" Weight="0.5"/>
    <Item TypeId="ForageableDefinition" SubtypeId="GrainPlant" Weight="1"/>
    <Item TypeId="ForageableDefinition" SubtypeId="MushroomPlant" Weight="0.5"/>
    <Item TypeId="ForageableDefinition" SubtypeId="VegetablePlant" Weight="1"/>
  </Items>
</Definition>

I did copy that to a local mod and then removed all other plants which did make me find mushrooms all over the place, so it's confirmed that it can spawn mushrooms and it's the right definition to look at.

I made a mod script to find forageables but because I have to be within some hundred meters from them (probably varies as it's based on sector LOD) I have to go around with spec cam to trigger them. I also marked where I've been with a giant dot billboard and recorded the forageables based on their position, so finding the same location twice would not count it twice.

I'm around the planet's center there with spec cam looking outward towards the surface, the lines are where I've been with spectator camera (only recorded within 300m from the surface, I tried to be around ground level when I flew) and the text is what it found in total... as you can see 1 mushroom, ~170 of everything else, and considering the weight that they have in the above definition, this makes no sense at all.

I also tried replicating how the sampler from MyPhysicalModelCollectionDefinition.Items is used:

> var ids = new List<string>();
> var weights = new List<float>();
> ids.Add("FruitPlant"); weights.Add(0.5f);
> ids.Add("GrainPlant"); weights.Add(1f);
> ids.Add("MushroomPlant"); weights.Add(0.5f);
> ids.Add("VegetablePlant"); weights.Add(1f);
> var sampler = new MyDiscreteSampler<string>(ids, weights);
> void TestSamples()
. {
.     for (int num = 0; num < 30; num++)
.     {
.         float seed = MyHashRandomUtils.UniformFloatFromSeed(num);
. 
.         string lastRes = sampler.Sample(seed);
.         for (int i = 0; i < 1000; i++)
.         {
.             string res = sampler.Sample(seed);
.             if (res != lastRes)
.             {
.                 Console.WriteLine("got different result!!!!");
.             }
.         }
. 
.         Console.WriteLine($"#{num} -- {lastRes}");
.     }
. }
> TestSamples()
#0 -- FruitPlant
#1 -- GrainPlant
#2 -- VegetablePlant
#3 -- VegetablePlant
#4 -- VegetablePlant
#5 -- GrainPlant
#6 -- GrainPlant
#7 -- FruitPlant
#8 -- GrainPlant
#9 -- MushroomPlant
#10 -- VegetablePlant
#11 -- GrainPlant
#12 -- FruitPlant
#13 -- FruitPlant
#14 -- FruitPlant
#15 -- GrainPlant
#16 -- VegetablePlant
#17 -- MushroomPlant
#18 -- GrainPlant
#19 -- VegetablePlant
#20 -- GrainPlant
#21 -- VegetablePlant
#22 -- MushroomPlant
#23 -- GrainPlant
#24 -- VegetablePlant
#25 -- GrainPlant
#26 -- FruitPlant
#27 -- VegetablePlant
#28 -- MushroomPlant
#29 -- GrainPlant

But I don't really understand the number being inputted in the code, it does sound like it never/rarely reaches 10.

Anyway, without a way to easily spawn them on the entire planet I can't really show an accurate distribution, but what I've searched so far clearly has it extremely skewed against mushrooms, so something needs to be fixed.

I can share the modscript I used if needed, but I imagine you (devs) have better tools for these things.