many worldgen mods and gonna try technic now

mods/dfcaverns/big_webs/LICENSE.txt

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+Sounds and textures are under various licenses, see the license.txt file in the /sounds and /textures directories for details.
+
+License for Code
+----------------
+
+Copyright (C) 2021 FaceDeer
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

mods/dfcaverns/big_webs/init.lua

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+local modname = minetest.get_current_modname()
+local S = minetest.get_translator(modname)
+
+local sound
+if df_dependencies.sound_leaves then
+	sound = df_dependencies.sound_leaves()
+end
+
+local get_node_box = function(connector_thickness)
+	return {
+		type = "connected",
+		--fixed = {-hub_thickness,-hub_thickness,-hub_thickness,hub_thickness,hub_thickness,hub_thickness},
+		connect_top = {-connector_thickness, 0, -connector_thickness, connector_thickness, 0.5, connector_thickness},
+		connect_bottom = {-connector_thickness, -0.5, -connector_thickness, connector_thickness, 0, connector_thickness},
+		connect_back = {-connector_thickness, -connector_thickness, 0, connector_thickness, connector_thickness, 0.5},
+		connect_right = {0, -connector_thickness, -connector_thickness, 0.5, connector_thickness, connector_thickness},
+		connect_front = {-connector_thickness, -connector_thickness, -0.5, connector_thickness, connector_thickness, 0},
+		connect_left = {-0.5, -connector_thickness, -connector_thickness, 0, connector_thickness, connector_thickness},
+		disconnected = {-connector_thickness, -connector_thickness, -connector_thickness, connector_thickness, connector_thickness, connector_thickness},
+	}
+end
+
+local anchor_groups = {"group:soil", "group:stone", "group:tree", "group:wood", "group:webbing", "group:solid"}
+
+local in_anchor_group = function(name)
+	for _, group in pairs(anchor_groups) do
+		if minetest.get_item_group(name, string.sub(group, 7)) then
+			return true
+		end
+	end
+	if name == "ignore" then
+		return true
+	end
+end
+
+local cardinal_directions = {
+	{x=1,y=0,z=0},
+	{x=-1,y=0,z=0},
+	{x=0,y=1,z=0},
+	{x=0,y=-1,z=0},
+	{x=0,y=0,z=1},
+	{x=0,y=0,z=-1}
+}
+
+local cardinal_planes = {
+	{3,5},
+	{3,5},
+	{1,5},
+	{1,5},
+	{1,3},
+	{1,3},
+}
+
+local insert_if_not_in_hashtable = function(pos, insert_into, if_not_in)
+	local hash = minetest.hash_node_position(pos)
+	if if_not_in[hash] then
+		return
+	end
+	table.insert(insert_into, pos)
+end
+
+-- flood fill through the web to get all web and anchor locations
+local get_web_nodes = function(pos, webs, anchors)
+	local to_check = {}
+	table.insert(to_check, pos)
+	while next(to_check) ~= nil do
+		local check_pos = table.remove(to_check)
+		local check_node = minetest.get_node(check_pos)
+		if minetest.get_item_group(check_node.name, "webbing") > 0 then
+			webs[minetest.hash_node_position(check_pos)] = true
+			for _, dir in pairs(cardinal_directions) do
+				insert_if_not_in_hashtable(vector.add(check_pos, dir), to_check, webs)
+			end
+		elseif in_anchor_group(check_node.name) then
+			anchors[minetest.hash_node_position(check_pos)] = true
+		end		
+	end	
+end
+
+local web_line = function(pos, dir, distance)
+	local anchored
+	local web_spine = {}
+	for i = 0, distance do
+		local web_pos = vector.add(pos, vector.multiply(dir,i))
+		local node_name = minetest.get_node(web_pos).name
+		if node_name == "air" or node_name == "big_webs:webbing" then
+			table.insert(web_spine, web_pos)
+		elseif in_anchor_group(node_name) then
+			anchored=true
+			break
+		else
+			anchored=false
+			break
+		end
+	end
+
+	if anchored then
+		for _, web_pos in pairs(web_spine) do
+			if math.random() < 0.9 then
+				minetest.set_node(web_pos, {name="big_webs:webbing"})
+			end
+		end
+		return web_spine
+	end
+	return nil
+end
+
+local generate_web = function(pos)
+	local dir_choice = math.random(1, 6)
+	local dir = cardinal_directions[dir_choice]
+	local web_spine = web_line(pos, dir, 30)
+	if web_spine then
+		local dir2 = cardinal_directions[cardinal_planes[dir_choice][math.random(1, 2)]]
+		local dir2_opposite = vector.multiply(dir2, -1)
+		for _, web_pos in pairs(web_spine) do
+			web_line(web_pos, dir2, 15)
+			web_line(web_pos, dir2_opposite, 15)
+		end
+	end
+end
+
+minetest.register_node("big_webs:webbing", {
+	description = S("Giant Cave Spider Webbing"),
+	_doc_items_longdesc = S("Thick ropes of sticky, springy silk, strung between cavern walls in hopes of catching bats and even larger beasts."),
+	_doc_items_usagehelp = S("Webbing can be collected and re-strung elsewhere to aid in climbing. It absorbs all falling damage when you land on it."),
+	tiles = {
+		{name="big_webs.png"},
+	},
+	use_texture_alpha = "blend",
+    connects_to = anchor_groups,
+    connect_sides = { "top", "bottom", "front", "left", "back", "right" },
+	drawtype = "nodebox",
+	node_box = get_node_box(0.0625),
+	collision_box = get_node_box(0.0625),
+	inventory_image = "big_webs_item.png",
+	wield_image = "big_webs_item.png",
+	paramtype = "light",
+	is_ground_content = false,
+	climbable = true,
+	groups = {snappy = 2, choppy = 2, webbing = 1, shearsy = 1,  swordy=1, flammable=1, destroy_by_lava_flow=1, fall_damage_add_percent=-100, bouncy=20},
+	sounds = sound,
+	on_construct = function(pos)
+		minetest.get_node_timer(pos):start(30)
+	end,
+	on_destruct = function(pos)
+		for _, dir in pairs(cardinal_directions) do
+			local neighbor_pos = vector.add(pos, dir)
+			if minetest.get_item_group(minetest.get_node(neighbor_pos).name, "webbing") > 0 then
+				minetest.get_node_timer(neighbor_pos):start(30)
+			end
+		end
+		minetest.get_node_timer(pos):stop()
+	end,
+	on_timer = function(pos, elapsed)
+		local webs = {}
+		local anchors = {}
+		get_web_nodes(pos, webs, anchors)
+		local first_anchor = next(anchors)
+		for hash, _ in pairs(webs) do
+			local web_pos = minetest.get_position_from_hash(hash)
+			if first_anchor == nil then
+				-- unsupported web
+				minetest.set_node(web_pos, {name="air"})
+				minetest.item_drop(ItemStack("big_webs:webbing"), nil, web_pos)
+			end
+			minetest.get_node_timer(web_pos):stop() -- no need to recheck
+		end	
+	end,
+	_mcl_blast_resistance = 1.0,
+	_mcl_hardness = 0.5,
+})
+
+minetest.register_node("big_webs:web_egg", {
+	description = S("Giant Cave Spider Web Generator"),
+	tiles = {
+		{name="big_webs.png"},
+	},
+	use_texture_alpha = "blend",
+    connects_to = anchor_groups,
+    connect_sides = { "top", "bottom", "front", "left", "back", "right" },
+	drawtype = "nodebox",
+	node_box = get_node_box(0.0625),
+	collision_box = get_node_box(0.0625),
+	inventory_image = "big_webs_item.png",
+	wield_image = "big_webs_item.png",
+	paramtype = "light",
+	is_ground_content = false,
+	climbable = true,
+	floodable = true,
+	groups = {snappy = 2, choppy = 2, webbing = 1, flammable=1, fall_damage_add_percent=-100, bouncy=20},
+	sounds = sound,
+	on_construct = function(pos)
+		minetest.get_node_timer(pos):start(1)
+	end,
+	on_timer = function(pos, elapsed)
+		minetest.set_node(pos, {name="air"})
+		generate_web(pos)
+	end,
+	_mcl_blast_resistance = 1.0,
+	_mcl_hardness = 0.5,
+})

mods/dfcaverns/big_webs/locale/template.txt

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+# textdomain: big_webs
+
+
+### init.lua ###
+
+Giant Cave Spider Web Generator=
+Giant Cave Spider Webbing=
+
+Thick ropes of sticky, springy silk, strung between cavern walls in hopes of catching bats and even larger beasts.=
+
+Webbing can be collected and re-strung elsewhere to aid in climbing. It absorbs all falling damage when you land on it.=
+

mods/dfcaverns/big_webs/mod.conf

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+name=big_webs
+optional_depends=df_dependencies