diff --git a/init.lua b/init.lua
index 983946d..28524cf 100644
--- a/init.lua
+++ b/init.lua
@@ -19,17 +19,23 @@ local function lf(path)
 end
 
 i3 = {
-	modules = {},
-	MAX_FAVS = 6,
-	ITEM_BTN_SIZE = 1.1,
-	DROP_BAG_ON_DIE = true,
-	MIN_FORMSPEC_VERSION = 4,
-	SAVE_INTERVAL = 600, -- Player data save interval (in seconds)
+	settings = {
+		max_favs = 6,
+		min_fs_version = 4,
+		item_btn_size = 1.1,
+		drop_bag_on_die = true,
+		save_interval = 600, -- Player data save interval (in seconds)
 
-	HUD_TIMER_MAX = 1.5,
-	HUD_SPEED = 1,
+		hud_speed = 1,
+		hud_timer_max = 1.5,
 
-	SUBCAT = {
+		damage_enabled   = core.settings:get_bool"enable_damage",
+		progressive_mode = core.settings:get_bool"i3_progressive_mode",
+		legacy_inventory = core.settings:get_bool"i3_legacy_inventory",
+		item_compression = core.settings:get_bool("i3_item_compression", true),
+	},
+
+	categories = {
 		"bag",
 		"armor",
 		"skins",
@@ -37,7 +43,7 @@ i3 = {
 		"waypoints",
 	},
 
-	META_SAVES = {
+	saves = { -- Metadata to save
 		bag = true,
 		home = true,
 		waypoints = true,
@@ -46,21 +52,6 @@ i3 = {
 		known_recipes = true,
 	},
 
-	-- Caches
-	init_items = {},
-	fuel_cache = {},
-	usages_cache = {},
-	recipes_cache = {},
-	cubes = {},
-	plants = {},
-
-	tabs = {},
-	craft_types = {},
-
-	recipe_filters = {},
-	search_filters = {},
-	sorting_methods = {},
-
 	files = {
 		api = lf"/src/api.lua",
 		bags = lf"/src/bags.lua",
@@ -84,13 +75,25 @@ i3 = {
 		}
 	},
 
-	progressive_mode = core.settings:get_bool"i3_progressive_mode",
-	legacy_inventory = core.settings:get_bool"i3_legacy_inventory",
-	item_compression = core.settings:get_bool("i3_item_compression", true),
+	-- Caches
+	init_items = {},
+	fuel_cache = {},
+	usages_cache = {},
+	recipes_cache = {},
+
+	tabs = {},
+	cubes = {},
+	plants = {},
+	modules = {},
+	craft_types = {},
+
+	recipe_filters = {},
+	search_filters = {},
+	sorting_methods = {},
 }
 
-i3.HOTBAR_LEN = i3.legacy_inventory and 8 or 9
-i3.INV_SIZE   = 4 * i3.HOTBAR_LEN
+i3.settings.hotbar_len = i3.settings.legacy_inventory and 8 or 9
+i3.settings.inv_size   = 4 * i3.settings.hotbar_len
 
 i3.files.common()
 i3.files.api(http)
@@ -191,7 +194,7 @@ local function init_data(player, info)
 	data.fs_version      = info.formspec_version
 
 	local inv = player:get_inventory()
-	inv:set_size("main", i3.INV_SIZE)
+	inv:set_size("main", i3.settings.inv_size)
 
 	core.after(0, set_fs, player)
 end
@@ -201,7 +204,7 @@ local function save_data(player_name)
 
 	for name, v in pairs(_data) do
 	for dat in pairs(v) do
-		if not i3.META_SAVES[dat] then
+		if not i3.saves[dat] then
 			_data[name][dat] = nil
 
 			if player_name and i3.data[player_name] then
@@ -223,7 +226,7 @@ core.register_on_joinplayer(function(player)
 	local name = player:get_player_name()
 	local info = core.get_player_information and core.get_player_information(name)
 
-	if not info or get_formspec_version(info) < i3.MIN_FORMSPEC_VERSION then
+	if not info or get_formspec_version(info) < i3.settings.min_fs_version then
 		return outdated(name)
 	end
 
@@ -242,12 +245,12 @@ core.register_on_shutdown(save_data)
 
 local function routine()
 	save_data()
-	core.after(i3.SAVE_INTERVAL, routine)
+	core.after(i3.settings.save_interval, routine)
 end
 
-core.after(i3.SAVE_INTERVAL, routine)
+core.after(i3.settings.save_interval, routine)
 
-if i3.progressive_mode then
+if i3.settings.progressive_mode then
 	i3.files.progressive()
 end
 
diff --git a/src/callbacks.lua b/src/callbacks.lua
index 01fa155..0cb3152 100644
--- a/src/callbacks.lua
+++ b/src/callbacks.lua
@@ -56,7 +56,7 @@ i3.new_tab("inventory", {
 
 		for field in pairs(fields) do
 			if sub(field, 1, 4) == "btn_" then
-				data.subcat = indexof(i3.SUBCAT, sub(field, 5))
+				data.subcat = indexof(i3.categories, sub(field, 5))
 				break
 
 			elseif sub(field, 1, 3) == "cb_" then
@@ -379,7 +379,7 @@ local function rcp_fields(player, data, fields)
 		local fav, i = is_fav(data.favs, data.query_item)
 		local total = #data.favs
 
-		if total < i3.MAX_FAVS and not fav then
+		if total < i3.settings.max_favs and not fav then
 			data.favs[total + 1] = data.query_item
 		elseif fav then
 			remove(data.favs, i)
@@ -479,7 +479,7 @@ core.register_on_dieplayer(function(player)
 	local data = i3.data[name]
 	if not data then return end
 
-	if i3.DROP_BAG_ON_DIE then
+	if i3.settings.drop_bag_on_die then
 		local bagstack = ItemStack(data.bag)
 		spawn_item(player, bagstack)
 	end
diff --git a/src/common.lua b/src/common.lua
index 8ec6e2c..dd40517 100644
--- a/src/common.lua
+++ b/src/common.lua
@@ -282,7 +282,7 @@ local function apply_recipe_filters(recipes, player)
 end
 
 local function compression_active(data)
-	return i3.item_compression and not next(i3.recipe_filters) and data.filter == ""
+	return i3.settings.item_compression and not next(i3.recipe_filters) and data.filter == ""
 end
 
 local function compressible(item, data)
@@ -539,7 +539,7 @@ local function sort_inventory(player, data)
 	local inv = player:get_inventory()
 	local list = inv:get_list"main"
 	local size = inv:get_size"main"
-	local start_i = data.ignore_hotbar and (i3.HOTBAR_LEN + 1) or 1
+	local start_i = data.ignore_hotbar and (i3.settings.hotbar_len + 1) or 1
 
 	if true_table(data.drop_items) then
 		list = drop_items(player, inv, list, start_i, data.drop_items)
diff --git a/src/gui.lua b/src/gui.lua
index fc9a26f..92ab370 100644
--- a/src/gui.lua
+++ b/src/gui.lua
@@ -1,4 +1,5 @@
-local damage_enabled = core.settings:get_bool"enable_damage"
+local damage_enabled = i3.settings.damage_enabled
+local hotbar_len = i3.settings.hotbar_len
 
 local model_aliases = i3.files.model_alias()
 local PNG, styles, fs_elements, colors = i3.files.styles()
@@ -122,22 +123,22 @@ local function get_stack_max(inv, data, is_recipe, rcp)
 end
 
 local function get_inv_slots(fs)
-	local inv_x = i3.legacy_inventory and 0.75 or 0.22
+	local inv_x = i3.settings.legacy_inventory and 0.75 or 0.22
 	local inv_y = 6.9
 	local size, spacing = 1, 0.1
 
 	fs"style_type[box;colors=#77777710,#77777710,#777,#777]"
 
-	for i = 0, i3.HOTBAR_LEN - 1 do
+	for i = 0, hotbar_len - 1 do
 		fs("box", i * size + inv_x + (i * spacing), inv_y, size, size, "")
 	end
 
 	fs(fmt("style_type[list;size=%f;spacing=%f]", size, spacing),
-	   fmt("list[current_player;main;%f,%f;%u,1;]", inv_x, inv_y, i3.HOTBAR_LEN))
+	   fmt("list[current_player;main;%f,%f;%u,1;]", inv_x, inv_y, hotbar_len))
 
 	fs(fmt("style_type[list;size=%f;spacing=%f]", size, spacing),
 	   fmt("list[current_player;main;%f,%f;%u,%u;%u]", inv_x, inv_y + 1.15,
-		i3.HOTBAR_LEN, i3.INV_SIZE / i3.HOTBAR_LEN, i3.HOTBAR_LEN),
+		hotbar_len, i3.settings.inv_size / hotbar_len, hotbar_len),
 	   "style_type[list;size=1;spacing=0.15]")
 
 	fs"listring[current_player;craft]listring[current_player;main]"
@@ -233,7 +234,7 @@ local function get_isometric_view(fs, pos, X, Y, t, cubes, depth, high)
 	local width = 8
 	local base_height = 4
 	local base_depth = depth == -1
-	local max_depth = -5
+	local max_depth = -10
 	local height = base_depth and (base_height - 1) or depth
 
 	local pos1 = vec_new(pos.x - width, pos.y + depth, pos.z - width)
@@ -454,7 +455,7 @@ local function get_container(fs, data, player, yoffset, ctn_len, award_list, awa
 
 	local yextra = damage_enabled and 5.5 or 5
 
-	for i, title in ipairs(i3.SUBCAT) do
+	for i, title in ipairs(i3.categories) do
 		local btn_name = fmt("btn_%s", title)
 		fs(fmt("style[btn_%s;fgimg=%s;fgimg_hovered=%s;content_offset=0]", title,
 			data.subcat == i and PNG[fmt("%s_hover", title)] or PNG[title],
@@ -790,7 +791,8 @@ local function get_tooltip(item, info, pos)
 	end
 
 	if pos then
-		return fmt("tooltip", pos.x, pos.y, i3.ITEM_BTN_SIZE, i3.ITEM_BTN_SIZE, ESC(tooltip))
+		local btn_size = i3.settings.item_btn_size
+		return fmt("tooltip", pos.x, pos.y, btn_size, btn_size, ESC(tooltip))
 	end
 
 	return fmt("tooltip[%s;%s]", item, ESC(tooltip))
@@ -832,14 +834,15 @@ local function get_output_fs(fs, data, rcp, is_recipe, shapeless, right, btn_siz
 		end
 	end
 
-	local arrow_X = right + 0.2 + (_btn_size or i3.ITEM_BTN_SIZE)
+	local BTN_SIZE = i3.settings.item_btn_size
+	local arrow_X = right + 0.2 + (_btn_size or BTN_SIZE)
 	local X = arrow_X + 1.2
 	local Y = data.yoffset + 1.4
 
 	fs("image", arrow_X, Y + 0.06, 1, 1, PNG.arrow)
 
 	if fuel then
-		fs("animated_image", X + 0.05, Y, i3.ITEM_BTN_SIZE, i3.ITEM_BTN_SIZE, PNG.fire_anim, 8, 180)
+		fs("animated_image", X + 0.05, Y, BTN_SIZE, BTN_SIZE, PNG.fire_anim, 8, 180)
 		return
 	end
 
@@ -848,17 +851,17 @@ local function get_output_fs(fs, data, rcp, is_recipe, shapeless, right, btn_siz
 	local name  = item:get_name()
 	local count = item:get_count()
 	local wear  = item:get_wear()
-	local bt_s  = i3.ITEM_BTN_SIZE * 1.2
+	local bt_s  = BTN_SIZE * 1.2
 	local _name = fmt("_%s", name)
 	local pos
 
 	if meta:get_string"color" ~= "" or meta:get_string"palette_index" ~= "" then
 		local rcp_usg = is_recipe and "rcp" or "usg"
 
-		fs(fmt("style_type[list;size=%f]", i3.ITEM_BTN_SIZE))
+		fs(fmt("style_type[list;size=%f]", BTN_SIZE))
 		fs"listcolors[#bababa50;#bababa99]"
 		fs(fmt("list[detached:i3_output_%s_%s;main;%f,%f;1,1;]", rcp_usg, data.player_name, X + 0.11, Y))
-		fs("button",  X + 0.11, Y, i3.ITEM_BTN_SIZE, i3.ITEM_BTN_SIZE, _name, "")
+		fs("button",  X + 0.11, Y, BTN_SIZE, BTN_SIZE, _name, "")
 
 		local inv = get_detached_inv(fmt("output_%s", rcp_usg), data.player_name)
 		inv:set_stack("main", 1, item)
@@ -866,7 +869,7 @@ local function get_output_fs(fs, data, rcp, is_recipe, shapeless, right, btn_siz
 	else
 		fs("image", X, Y - 0.11, bt_s, bt_s, PNG.slot)
 		fs("item_image_button",
-			X + 0.11, Y, i3.ITEM_BTN_SIZE, i3.ITEM_BTN_SIZE,
+			X + 0.11, Y, BTN_SIZE, BTN_SIZE,
 			fmt("%s %u %u", name, count * (is_recipe and data.scrbar_rcp or data.scrbar_usg or 1), wear),
 			_name, "")
 	end
@@ -898,7 +901,8 @@ end
 
 local function get_grid_fs(fs, data, rcp, is_recipe)
 	local width = rcp.width or 1
-	local right, btn_size, _btn_size = 0, i3.ITEM_BTN_SIZE
+	local right = 0
+	local btn_size, _btn_size = i3.settings.item_btn_size
 	local cooktime, shapeless
 
 	if rcp.type == "cooking" then
@@ -1113,9 +1117,10 @@ end
 local function get_header(fs, data)
 	local fav = is_fav(data.favs, data.query_item)
 	local nfavs = #data.favs
+	local max_favs = i3.settings.max_favs
 	local star_x, star_y, size = data.inv_width + 0.3, data.yoffset + 0.2, 0.4
 
-	if nfavs < i3.MAX_FAVS or (nfavs == i3.MAX_FAVS and fav) then
+	if nfavs < max_favs or (nfavs == max_favs and fav) then
 		local fav_marked = fmt("i3_fav%s.png", fav and "_off" or "")
 		fs(fmt("style[fav;fgimg=%s;fgimg_hovered=%s;fgimg_pressed=%s]",
 			fmt("i3_fav%s.png", fav and "" or "_off"), fav_marked, fav_marked))
@@ -1342,6 +1347,7 @@ local function get_items_fs(fs, player, data, full_height)
 end
 
 local function get_favs(fs, data)
+	local btn_size = i3.settings.item_btn_size
 	fs("label", data.inv_width + 0.4, data.yoffset + 0.4, ES"Bookmarks")
 
 	for i = 1, #data.favs do
@@ -1350,10 +1356,10 @@ local function get_favs(fs, data)
 		local Y = data.yoffset + 0.8
 
 		if data.query_item == item then
-			fs("image", X, Y, i3.ITEM_BTN_SIZE, i3.ITEM_BTN_SIZE, PNG.slot)
+			fs("image", X, Y, btn_size, btn_size, PNG.slot)
 		end
 
-		fs("item_image_button", X, Y, i3.ITEM_BTN_SIZE, i3.ITEM_BTN_SIZE, item, item, "")
+		fs("item_image_button", X, Y, btn_size, btn_size, item, item, "")
 	end
 end
 
@@ -1490,7 +1496,7 @@ local function make_fs(player, data)
 	local tab = i3.tabs[data.tab]
 
 	fs(fmt("formspec_version[%u]size[%f,%f]no_prepend[]bgcolor[#0000]",
-		i3.MIN_FORMSPEC_VERSION, data.inv_width + 8, full_height), styles)
+		i3.settings.min_fs_version, data.inv_width + 8, full_height), styles)
 
 	fs("bg9", 0, 0, data.inv_width, full_height, PNG.bg_full, 10)
 
diff --git a/src/hud.lua b/src/hud.lua
index 5469460..72d1a96 100644
--- a/src/hud.lua
+++ b/src/hud.lua
@@ -36,7 +36,7 @@ local function init_hud(player)
 
 	if not i3.legacy_inventory then
 		core.after(0, function()
-			player:hud_set_hotbar_itemcount(i3.HOTBAR_LEN)
+			player:hud_set_hotbar_itemcount(i3.settings.hotbar_len)
 			player:hud_set_hotbar_image"i3_hotbar.png"
 		end)
 	end
@@ -66,18 +66,18 @@ local function show_hud(player, data)
 
 			player:hud_change(def, "position", {
 				x = hud_info.position.x,
-				y = hud_info.position.y - ((dt / 5) * i3.HUD_SPEED)
+				y = hud_info.position.y - ((dt / 5) * i3.settings.hud_speed)
 			})
 		end
 
 	elseif data.show_hud == false then
-		if data.hud_timer >= i3.HUD_TIMER_MAX then
+		if data.hud_timer >= i3.settings.hud_timer_max then
 			for _, def in pairs(data.hud) do
 				local hud_info = player:hud_get(def)
 
 				player:hud_change(def, "position", {
 					x = hud_info.position.x,
-					y = hud_info.position.y + ((dt / 5) * i3.HUD_SPEED)
+					y = hud_info.position.y + ((dt / 5) * i3.settings.hud_speed)
 				})
 			end