Fix is_ground_content settings for nodes

Remove line if set to the default of 'true'

mods/beds/api.lua

@@ -7,6 +7,7 @@ function beds.register_bed(name, def)
 		tiles = def.tiles.bottom,
 		paramtype = "light",
 		paramtype2 = "facedir",
+		is_ground_content = false,
 		stack_max = 1,
 		groups = {snappy = 1, choppy = 2, oddly_breakable_by_hand = 2, flammable = 3, bed = 1},
 		sounds = default.node_sound_wood_defaults(),
@@ -87,6 +88,7 @@ function beds.register_bed(name, def)
 		tiles = def.tiles.top,
 		paramtype = "light",
 		paramtype2 = "facedir",
+		is_ground_content = false,
 		groups = {snappy = 1, choppy = 2, oddly_breakable_by_hand = 2, flammable = 3, bed = 2},
 		sounds = default.node_sound_wood_defaults(),
 		node_box = {

mods/default/nodes.lua

@@ -147,7 +147,6 @@ default:nyancat_rainbow
 minetest.register_node("default:stone", {
 	description = "Stone",
 	tiles = {"default_stone.png"},
-	is_ground_content = true,
 	groups = {cracky=3, stone=1},
 	drop = 'default:cobble',
 	legacy_mineral = true,
@@ -157,7 +156,7 @@ minetest.register_node("default:stone", {
 minetest.register_node("default:cobble", {
 	description = "Cobblestone",
 	tiles = {"default_cobble.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {cracky=3, stone=2},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -165,6 +164,7 @@ minetest.register_node("default:cobble", {
 minetest.register_node("default:stonebrick", {
 	description = "Stone Brick",
 	tiles = {"default_stone_brick.png"},
+	is_ground_content = false,
 	groups = {cracky=2, stone=1},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -172,7 +172,7 @@ minetest.register_node("default:stonebrick", {
 minetest.register_node("default:mossycobble", {
 	description = "Mossy Cobblestone",
 	tiles = {"default_mossycobble.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {cracky=3, stone=1},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -182,7 +182,6 @@ minetest.register_node("default:mossycobble", {
 minetest.register_node("default:desert_stone", {
 	description = "Desert Stone",
 	tiles = {"default_desert_stone.png"},
-	is_ground_content = true,
 	groups = {cracky=3, stone=1},
 	drop = 'default:desert_cobble',
 	legacy_mineral = true,
@@ -192,7 +191,7 @@ minetest.register_node("default:desert_stone", {
 minetest.register_node("default:desert_cobble", {
 	description = "Desert Cobblestone",
 	tiles = {"default_desert_cobble.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {cracky=3, stone=2},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -200,6 +199,7 @@ minetest.register_node("default:desert_cobble", {
 minetest.register_node("default:desert_stonebrick", {
 	description = "Desert Stone Brick",
 	tiles = {"default_desert_stone_brick.png"},
+	is_ground_content = false,
 	groups = {cracky=2, stone=1},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -209,7 +209,6 @@ minetest.register_node("default:desert_stonebrick", {
 minetest.register_node("default:sandstone", {
 	description = "Sandstone",
 	tiles = {"default_sandstone.png"},
-	is_ground_content = true,
 	groups = {crumbly=2,cracky=3},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -217,7 +216,7 @@ minetest.register_node("default:sandstone", {
 minetest.register_node("default:sandstonebrick", {
 	description = "Sandstone Brick",
 	tiles = {"default_sandstone_brick.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {cracky=2},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -227,7 +226,6 @@ minetest.register_node("default:sandstonebrick", {
 minetest.register_node("default:obsidian", {
 	description = "Obsidian",
 	tiles = {"default_obsidian.png"},
-	is_ground_content = true,
 	sounds = default.node_sound_stone_defaults(),
 	groups = {cracky=1,level=2},
 })
@@ -235,6 +233,7 @@ minetest.register_node("default:obsidian", {
 minetest.register_node("default:obsidianbrick", {
 	description = "Obsidian Brick",
 	tiles = {"default_obsidian_brick.png"},
+	is_ground_content = false,
 	sounds = default.node_sound_stone_defaults(),
 	groups = {cracky=1,level=2},
 })
@@ -246,7 +245,6 @@ minetest.register_node("default:obsidianbrick", {
 minetest.register_node("default:dirt", {
 	description = "Dirt",
 	tiles = {"default_dirt.png"},
-	is_ground_content = true,
 	groups = {crumbly=3,soil=1},
 	sounds = default.node_sound_dirt_defaults(),
 })
@@ -254,7 +252,6 @@ minetest.register_node("default:dirt", {
 minetest.register_node("default:dirt_with_grass", {
 	description = "Dirt with Grass",
 	tiles = {"default_grass.png", "default_dirt.png", "default_dirt.png^default_grass_side.png"},
-	is_ground_content = true,
 	groups = {crumbly=3,soil=1},
 	drop = 'default:dirt',
 	sounds = default.node_sound_dirt_defaults({
@@ -265,7 +262,6 @@ minetest.register_node("default:dirt_with_grass", {
 minetest.register_node("default:dirt_with_grass_footsteps", {
 	description = "Dirt with Grass and Footsteps",
 	tiles = {"default_grass_footsteps.png", "default_dirt.png", "default_dirt.png^default_grass_side.png"},
-	is_ground_content = true,
 	groups = {crumbly=3,soil=1,not_in_creative_inventory=1},
 	drop = 'default:dirt',
 	sounds = default.node_sound_dirt_defaults({
@@ -276,7 +272,6 @@ minetest.register_node("default:dirt_with_grass_footsteps", {
 minetest.register_node("default:dirt_with_snow", {
 	description = "Dirt with Snow",
 	tiles = {"default_snow.png", "default_dirt.png", "default_dirt.png^default_snow_side.png"},
-	is_ground_content = true,
 	groups = {crumbly=3,soil=1},
 	drop = 'default:dirt',
 	sounds = default.node_sound_dirt_defaults({
@@ -289,7 +284,6 @@ minetest.register_node("default:dirt_with_snow", {
 minetest.register_node("default:sand", {
 	description = "Sand",
 	tiles = {"default_sand.png"},
-	is_ground_content = true,
 	groups = {crumbly=3, falling_node=1, sand=1},
 	sounds = default.node_sound_sand_defaults(),
 })
@@ -297,7 +291,6 @@ minetest.register_node("default:sand", {
 minetest.register_node("default:desert_sand", {
 	description = "Desert Sand",
 	tiles = {"default_desert_sand.png"},
-	is_ground_content = true,
 	groups = {crumbly=3, falling_node=1, sand=1},
 	sounds = default.node_sound_sand_defaults(),
 })
@@ -307,7 +300,6 @@ minetest.register_node("default:desert_sand", {
 minetest.register_node("default:gravel", {
 	description = "Gravel",
 	tiles = {"default_gravel.png"},
-	is_ground_content = true,
 	groups = {crumbly=2, falling_node=1},
 	sounds = default.node_sound_dirt_defaults({
 		footstep = {name="default_gravel_footstep", gain=0.5},
@@ -320,7 +312,6 @@ minetest.register_node("default:gravel", {
 minetest.register_node("default:clay", {
 	description = "Clay",
 	tiles = {"default_clay.png"},
-	is_ground_content = true,
 	groups = {crumbly=3},
 	drop = 'default:clay_lump 4',
 	sounds = default.node_sound_dirt_defaults(),
@@ -333,7 +324,6 @@ minetest.register_node("default:snow", {
 	tiles = {"default_snow.png"},
 	inventory_image = "default_snowball.png",
 	wield_image = "default_snowball.png",
-	is_ground_content = true,
 	paramtype = "light",
 	buildable_to = true,
 	drawtype = "nodebox",
@@ -361,7 +351,6 @@ minetest.register_node("default:snow", {
 minetest.register_node("default:snowblock", {
 	description = "Snow Block",
 	tiles = {"default_snow.png"},
-	is_ground_content = true,
 	groups = {crumbly=3},
 	sounds = default.node_sound_dirt_defaults({
 		footstep = {name="default_snow_footstep", gain=0.25},
@@ -398,6 +387,7 @@ minetest.register_node("default:tree", {
 minetest.register_node("default:wood", {
 	description = "Wooden Planks",
 	tiles = {"default_wood.png"},
+	is_ground_content = false,
 	groups = {choppy=2,oddly_breakable_by_hand=2,flammable=3,wood=1},
 	sounds = default.node_sound_wood_defaults(),
 })
@@ -412,7 +402,6 @@ minetest.register_node("default:sapling", {
 	paramtype = "light",
 	sunlight_propagates = true,
 	walkable = false,
-	is_ground_content = true,
 	selection_box = {
 		type = "fixed",
 		fixed = {-0.3, -0.5, -0.3, 0.3, 0.35, 0.3}
@@ -459,7 +448,7 @@ minetest.register_node("default:apple", {
 	paramtype = "light",
 	sunlight_propagates = true,
 	walkable = false,
-	is_ground_content = true,
+	is_ground_content = false,
 	selection_box = {
 		type = "fixed",
 		fixed = {-0.2, -0.5, -0.2, 0.2, 0, 0.2}
@@ -491,6 +480,7 @@ minetest.register_node("default:jungletree", {
 minetest.register_node("default:junglewood", {
 	description = "Junglewood Planks",
 	tiles = {"default_junglewood.png"},
+	is_ground_content = false,
 	groups = {choppy=2,oddly_breakable_by_hand=2,flammable=3,wood=1},
 	sounds = default.node_sound_wood_defaults(),
 })
@@ -558,6 +548,7 @@ minetest.register_node("default:pinetree", {
 minetest.register_node("default:pinewood", {
 	description = "Pinewood Planks",
 	tiles = {"default_pinewood.png"},
+	is_ground_content = false,
 	groups = {choppy=2,oddly_breakable_by_hand=2,flammable=3,wood=1},
 	sounds = default.node_sound_wood_defaults(),
 })
@@ -600,7 +591,6 @@ minetest.register_node("default:pine_sapling", {
 	wield_image = "default_pine_sapling.png",
 	paramtype = "light",
 	walkable = false,
-	is_ground_content = true,
 	selection_box = {
 		type = "fixed",
 		fixed = {-0.3, -0.5, -0.3, 0.3, 0.35, 0.3}
@@ -616,7 +606,6 @@ minetest.register_node("default:pine_sapling", {
 minetest.register_node("default:stone_with_coal", {
 	description = "Coal Ore",
 	tiles = {"default_stone.png^default_mineral_coal.png"},
-	is_ground_content = true,
 	groups = {cracky=3},
 	drop = 'default:coal_lump',
 	sounds = default.node_sound_stone_defaults(),
@@ -625,7 +614,7 @@ minetest.register_node("default:stone_with_coal", {
 minetest.register_node("default:coalblock", {
 	description = "Coal Block",
 	tiles = {"default_coal_block.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {cracky=3},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -635,7 +624,6 @@ minetest.register_node("default:coalblock", {
 minetest.register_node("default:stone_with_iron", {
 	description = "Iron Ore",
 	tiles = {"default_stone.png^default_mineral_iron.png"},
-	is_ground_content = true,
 	groups = {cracky=2},
 	drop = 'default:iron_lump',
 	sounds = default.node_sound_stone_defaults(),
@@ -644,7 +632,7 @@ minetest.register_node("default:stone_with_iron", {
 minetest.register_node("default:steelblock", {
 	description = "Steel Block",
 	tiles = {"default_steel_block.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {cracky=1,level=2},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -654,7 +642,6 @@ minetest.register_node("default:steelblock", {
 minetest.register_node("default:stone_with_copper", {
 	description = "Copper Ore",
 	tiles = {"default_stone.png^default_mineral_copper.png"},
-	is_ground_content = true,
 	groups = {cracky=2},
 	drop = 'default:copper_lump',
 	sounds = default.node_sound_stone_defaults(),
@@ -663,7 +650,7 @@ minetest.register_node("default:stone_with_copper", {
 minetest.register_node("default:copperblock", {
 	description = "Copper Block",
 	tiles = {"default_copper_block.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {cracky=1,level=2},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -671,7 +658,7 @@ minetest.register_node("default:copperblock", {
 minetest.register_node("default:bronzeblock", {
 	description = "Bronze Block",
 	tiles = {"default_bronze_block.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {cracky=1,level=2},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -682,7 +669,6 @@ minetest.register_node("default:stone_with_mese", {
 	description = "Mese Ore",
 	tiles = {"default_stone.png^default_mineral_mese.png"},
 	paramtype = "light",
-	is_ground_content = true,
 	groups = {cracky = 1},
 	drop = "default:mese_crystal",
 	sounds = default.node_sound_stone_defaults(),
@@ -693,7 +679,6 @@ minetest.register_node("default:mese", {
 	description = "Mese Block",
 	tiles = {"default_mese_block.png"},
 	paramtype = "light",
-	is_ground_content = true,
 	groups = {cracky = 1, level = 2},
 	sounds = default.node_sound_stone_defaults(),
 	light_source = 3,
@@ -705,7 +690,6 @@ minetest.register_node("default:mese", {
 minetest.register_node("default:stone_with_gold", {
 	description = "Gold Ore",
 	tiles = {"default_stone.png^default_mineral_gold.png"},
-	is_ground_content = true,
 	groups = {cracky=2},
 	drop = "default:gold_lump",
 	sounds = default.node_sound_stone_defaults(),
@@ -714,7 +698,7 @@ minetest.register_node("default:stone_with_gold", {
 minetest.register_node("default:goldblock", {
 	description = "Gold Block",
 	tiles = {"default_gold_block.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {cracky=1},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -724,7 +708,6 @@ minetest.register_node("default:goldblock", {
 minetest.register_node("default:stone_with_diamond", {
 	description = "Diamond Ore",
 	tiles = {"default_stone.png^default_mineral_diamond.png"},
-	is_ground_content = true,
 	groups = {cracky=1},
 	drop = "default:diamond",
 	sounds = default.node_sound_stone_defaults(),
@@ -733,7 +716,7 @@ minetest.register_node("default:stone_with_diamond", {
 minetest.register_node("default:diamondblock", {
 	description = "Diamond Block",
 	tiles = {"default_diamond_block.png"},
-	is_ground_content = true,
+	is_ground_content = false,
 	groups = {cracky=1,level=3},
 	sounds = default.node_sound_stone_defaults(),
 })
@@ -746,7 +729,6 @@ minetest.register_node("default:cactus", {
 	description = "Cactus",
 	tiles = {"default_cactus_top.png", "default_cactus_top.png", "default_cactus_side.png"},
 	paramtype2 = "facedir",
-	is_ground_content = true,
 	groups = {snappy=1,choppy=3,flammable=2},
 	sounds = default.node_sound_wood_defaults(),
 	on_place = minetest.rotate_node,
@@ -765,7 +747,6 @@ minetest.register_node("default:papyrus", {
 	paramtype = "light",
 	sunlight_propagates = true,
 	walkable = false,
-	is_ground_content = true,
 	selection_box = {
 		type = "fixed",
 		fixed = {-0.3, -0.5, -0.3, 0.3, 0.5, 0.3}
@@ -789,7 +770,6 @@ minetest.register_node("default:dry_shrub", {
 	paramtype = "light",
 	sunlight_propagates = true,
 	walkable = false,
-	is_ground_content = true,
 	buildable_to = true,
 	groups = {snappy=3,flammable=3,attached_node=1},
 	sounds = default.node_sound_leaves_defaults(),
@@ -811,7 +791,6 @@ minetest.register_node("default:junglegrass", {
 	sunlight_propagates = true,
 	walkable = false,
 	buildable_to = true,
-	is_ground_content = true,
 	groups = {snappy=3,flammable=2,flora=1,attached_node=1},
 	sounds = default.node_sound_leaves_defaults(),
 	selection_box = {
@@ -831,7 +810,6 @@ minetest.register_node("default:grass_1", {
 	paramtype = "light",
 	sunlight_propagates = true,
 	walkable = false,
-	is_ground_content = true,
 	buildable_to = true,
 	groups = {snappy=3,flammable=3,flora=1,attached_node=1},
 	sounds = default.node_sound_leaves_defaults(),
@@ -860,7 +838,6 @@ for i=2,5 do
 		sunlight_propagates = true,
 		walkable = false,
 		buildable_to = true,
-		is_ground_content = true,
 		drop = "default:grass_1",
 		groups = {snappy=3,flammable=3,flora=1,attached_node=1,not_in_creative_inventory=1},
 		sounds = default.node_sound_leaves_defaults(),
@@ -1585,6 +1562,7 @@ minetest.register_node("default:meselamp", {
 minetest.register_node("default:cloud", {
 	description = "Cloud",
 	tiles = {"default_cloud.png"},
+	is_ground_content = false,
 	sounds = default.node_sound_defaults(),
 	groups = {not_in_creative_inventory=1},
 })

mods/doors/init.lua

@@ -194,6 +194,7 @@ function doors.register_door(name, def)
 		tiles = {tb[2], tb[2], tb[2], tb[2], tb[1], tb[1].."^[transformfx"},
 		paramtype = "light",
 		paramtype2 = "facedir",
+		is_ground_content = false,
 		drop = name,
 		drawtype = "nodebox",
 		node_box = {
@@ -231,6 +232,7 @@ function doors.register_door(name, def)
 		tiles = {tt[2], tt[2], tt[2], tt[2], tt[1], tt[1].."^[transformfx"},
 		paramtype = "light",
 		paramtype2 = "facedir",
+		is_ground_content = false,
 		drop = "",
 		drawtype = "nodebox",
 		node_box = {
@@ -268,6 +270,7 @@ function doors.register_door(name, def)
 		tiles = {tb[2], tb[2], tb[2], tb[2], tb[1].."^[transformfx", tb[1]},
 		paramtype = "light",
 		paramtype2 = "facedir",
+		is_ground_content = false,
 		drop = name,
 		drawtype = "nodebox",
 		node_box = {
@@ -305,6 +308,7 @@ function doors.register_door(name, def)
 		tiles = {tt[2], tt[2], tt[2], tt[2], tt[1].."^[transformfx", tt[1]},
 		paramtype = "light",
 		paramtype2 = "facedir",
+		is_ground_content = false,
 		drop = "",
 		drawtype = "nodebox",
 		node_box = {
@@ -441,6 +445,7 @@ function doors.register_trapdoor(name, def)
 	def.drawtype = "nodebox"
 	def.paramtype = "light"
 	def.paramtype2 = "facedir"
+	def.is_ground_content = false
 
 	local def_opened = table.copy(def)
 	local def_closed = table.copy(def)

mods/farming/api.lua

@@ -230,7 +230,6 @@ farming.register_plant = function(name, def)
 			paramtype = "light",
 			walkable = false,
 			buildable_to = true,
-			is_ground_content = true,
 			drop = drop,
 			selection_box = {
 				type = "fixed",

mods/farming/nodes.lua

@@ -20,7 +20,6 @@ minetest.register_node("farming:soil", {
 	description = "Soil",
 	tiles = {"default_dirt.png^farming_soil.png", "default_dirt.png"},
 	drop = "default:dirt",
-	is_ground_content = true,
 	groups = {crumbly=3, not_in_creative_inventory=1, soil=2, grassland = 1, field = 1},
 	sounds = default.node_sound_dirt_defaults(),
 	soil = {
@@ -34,7 +33,6 @@ minetest.register_node("farming:soil_wet", {
 	description = "Wet Soil",
 	tiles = {"default_dirt.png^farming_soil_wet.png", "default_dirt.png^farming_soil_wet_side.png"},
 	drop = "default:dirt",
-	is_ground_content = true,
 	groups = {crumbly=3, not_in_creative_inventory=1, soil=3, wet = 1, grassland = 1, field = 1},
 	sounds = default.node_sound_dirt_defaults(),
 	soil = {
@@ -56,7 +54,6 @@ minetest.register_node("farming:desert_sand_soil", {
 	description = "Desert Sand Soil",
 	drop = "default:desert_sand",
 	tiles = {"farming_desert_sand_soil.png", "default_desert_sand.png"},
-	is_ground_content = true,
 	groups = {crumbly=3, not_in_creative_inventory = 1, falling_node=1, sand=1, soil = 2, desert = 1, field = 1},
 	sounds = default.node_sound_sand_defaults(),
 	soil = {
@@ -70,7 +67,6 @@ minetest.register_node("farming:desert_sand_soil_wet", {
 	description = "Wet Desert Sand Soil",
 	drop = "default:desert_sand",
 	tiles = {"farming_desert_sand_soil_wet.png", "farming_desert_sand_soil_wet_side.png"},
-	is_ground_content = true,
 	groups = {crumbly=3, falling_node=1, sand=1, not_in_creative_inventory=1, soil=3, wet = 1, desert = 1, field = 1},
 	sounds = default.node_sound_sand_defaults(),
 	soil = {

mods/stairs/init.lua

@@ -11,7 +11,7 @@ function stairs.register_stair(subname, recipeitem, groups, images, description,
 		tiles = images,
 		paramtype = "light",
 		paramtype2 = "facedir",
-		is_ground_content = true,
+		is_ground_content = false,
 		groups = groups,
 		sounds = sounds,
 		node_box = {
@@ -87,7 +87,7 @@ function stairs.register_slab(subname, recipeitem, groups, images, description,
 		tiles = images,
 		paramtype = "light",
 		paramtype2 = "facedir",
-		is_ground_content = true,
+		is_ground_content = false,
 		groups = groups,
 		sounds = sounds,
 		node_box = {

mods/tnt/init.lua

@@ -215,6 +215,7 @@ end
 minetest.register_node("tnt:tnt", {
 	description = "TNT",
 	tiles = {"tnt_top.png", "tnt_bottom.png", "tnt_side.png"},
+	is_ground_content = false,
 	groups = {dig_immediate=2, mesecon=2},
 	sounds = default.node_sound_wood_defaults(),
 	on_punch = function(pos, node, puncher)
@@ -268,6 +269,7 @@ minetest.register_node("tnt:gunpowder", {
 	description = "Gun Powder",
 	drawtype = "raillike",
 	paramtype = "light",
+	is_ground_content = false,
 	sunlight_propagates = true,
 	walkable = false,
 	tiles = {"tnt_gunpowder_straight.png", "tnt_gunpowder_curved.png", "tnt_gunpowder_t_junction.png", "tnt_gunpowder_crossing.png"},

mods/vessels/init.lua

@@ -89,6 +89,7 @@ minetest.register_node("vessels:glass_bottle", {
 	inventory_image = "vessels_glass_bottle_inv.png",
 	wield_image = "vessels_glass_bottle.png",
 	paramtype = "light",
+	is_ground_content = false,
 	walkable = false,
 	selection_box = {
 		type = "fixed",
@@ -114,6 +115,7 @@ minetest.register_node("vessels:drinking_glass", {
 	inventory_image = "vessels_drinking_glass_inv.png",
 	wield_image = "vessels_drinking_glass.png",
 	paramtype = "light",
+	is_ground_content = false,
 	walkable = false,
 	selection_box = {
 		type = "fixed",
@@ -139,6 +141,7 @@ minetest.register_node("vessels:steel_bottle", {
 	inventory_image = "vessels_steel_bottle_inv.png",
 	wield_image = "vessels_steel_bottle.png",
 	paramtype = "light",
+	is_ground_content = false,
 	walkable = false,
 	selection_box = {
 		type = "fixed",

mods/wool/init.lua

@@ -34,6 +34,7 @@ for _, row in ipairs(wool.dyes) do
 	minetest.register_node("wool:"..name, {
 		description = desc.." Wool",
 		tiles = {"wool_"..name..".png"},
+		is_ground_content = false,
 		groups = {snappy=2,choppy=2,oddly_breakable_by_hand=3,flammable=3,wool=1},
 		sounds = default.node_sound_defaults(),
 	})

mods/xpanes/init.lua

@@ -152,6 +152,7 @@ xpanes.register_pane("pane", {
 	tiles = {"xpanes_space.png"},
 	drawtype = "airlike",
 	paramtype = "light",
+	is_ground_content = false,
 	sunlight_propagates = true,
 	walkable = false,
 	pointable = false,
@@ -174,6 +175,7 @@ xpanes.register_pane("bar", {
 	tiles = {"xpanes_space.png"},
 	drawtype = "airlike",
 	paramtype = "light",
+	is_ground_content = false,
 	sunlight_propagates = true,
 	walkable = false,
 	pointable = false,