How to eliminate "Birch leaves" shrubs?

[florins]

I want to eliminate or reduce their spawn frequency (without impacting the spawns of actual birch trees) as part of a foliage mod I'm making. I'm talking about the mid-sized shrubs that spawn on the ground called "Birch leaves" ingame, not the leaves on top of a Birch tree.

In the in-game debug mode (Ctrl+F3), they have the code:

leaves-grown*-birch
(or)
leavesbranchy-grown*-birch

where "*" is an integer.

I tried to edit treengenproperties.json, I set Weight to 0 and/or MinTemp to very high for dwarfbirch under shrubgens. Tried via patch and via editing the actual gamefile itself. But I didn't notice any difference, they're still showing up.

I tried to find any file with both "leaves" and "chance" (or "weight") occurring, but couldn't find anything obvious.

I suspect that this survival/blocktypes/plant/leaves/normal.json file is important because it seems to actually define the leaves

// survival/blocktypes/plant/leaves/normal.json

{
	code: "leaves",
	"__comment": "BlockLeaves contains some code for map color tinting, stuff for wind affectedness and random testForDecay server block ticks",
	class: "BlockLeaves",
	behaviorsByType: {
		"*-grown*-*": [{name: "PushEventOnBlockBroken",	properties: {eventName: "testForDecay"}}, { name: "RainDrip" }],
		"*": [{ name: "RainDrip" }]
	},
	attributes: {
		handbook: {
			groupBy: ["leaves-*", "leavesnarrow-*"]
		},
		treeFellingGroupCodeByType: {
			"*-grown-crimsonkingmaple": "0maple",
			"*-grown1-crimsonkingmaple": "1maple",
			"*-grown2-crimsonkingmaple": "2maple",
			"*-grown3-crimsonkingmaple": "3maple",
			"*-grown4-crimsonkingmaple": "4maple",
			"*-grown5-crimsonkingmaple": "5maple",
			"*-grown6-crimsonkingmaple": "6maple",
			"*-grown7-crimsonkingmaple": "7maple",
			"*-grown-*": "0{wood}",
			"*-grown1-*": "1{wood}",
			"*-grown2-*": "2{wood}",
			"*-grown3-*": "3{wood}",
			"*-grown4-*": "4{wood}",
			"*-grown5-*": "5{wood}",
			"*-grown6-*": "6{wood}",
			"*-grown7-*": "7{wood}"
		},
		treeFellingGroupSpreadIndex: 0,
		canDecayByType: {
			"*-grown*-*": true
		}
	},
	variantgroups: [
		{ code: "type", states: ["grown", "grown1", "grown2", "grown3", "grown4", "grown5", "grown6", "grown7", "placed"] },
		{ code: "wood", states: ["crimsonkingmaple"], loadFromProperties: "block/wood" }
	],
	creativeinventory: { "general": ["leaves-placed-*"], "flora": ["leaves-placed-*"] },
	shapeInventory: { base: "block/plant/leaves/normal-lod0" },
	renderpass: "OpaqueNoCull",
	faceCullMode: "CollapseMaterial",
	blockmaterial: "Leaves",
	climateColorMapByType: {
		"*-crimsonkingmaple": "climateCrimsonKingTint",
		"*-redwood": "climateDarkerPlantTint",
		"*": "climatePlantTint"
	},
	seasonColorMapByType: {
		"*-pine": "seasonalNeedles",
		"*-redwood": "seasonalNeedles",
		"*-birch": "seasonalBirch",
		"*-maple": "seasonalMaple",
		"*-oak": "seasonalOak",
		"*-walnut": "seasonalWalnut",
		"*-larch": "seasonalLarch",
		"*-crimsonkingmaple": "seasonalCrimsonKingMaple",
		"*-kapok": "tropicalKapok",
		"*": "seasonalFoliage",
	},
	vertexFlags: {
		zOffset: 4,
		windMode: "Leaves"
	},
    //....
}

 

Edited April 9, 2025 by florins

[Wondiws98]

I found a way to stop shrubs from growing and it's by setting it's size multiplier to 0.

This can be done with any trees inside the folder "/worldgen/treegen".

Here is an example json file: tree-patch.json

Edited April 13, 2025 by Wondiws98
misspelling