Improve nether crystal panes

There was an attempt

mapgen_geodes.lua

@@ -198,8 +198,8 @@ mapgen.getGeodeInteriorNodeId = function(x, y, z)
 
 	local d3_1 = distSquaredList[3] - distSquaredList[1]
 	local d3_2 = distSquaredList[3] - distSquaredList[2]
-	local d4_1 = distSquaredList[4] - distSquaredList[1]
-    --local d4_3 = distSquaredList[4] - distSquaredList[3]
+	--local d4_1 = distSquaredList[4] - distSquaredList[1]
+	--local d4_3 = distSquaredList[4] - distSquaredList[3]
 
 	-- Some shape formulas (tuned for a structureSize of 50)
 	--   (d3_1 < 0.05) gives connective lines
@@ -212,9 +212,9 @@ mapgen.getGeodeInteriorNodeId = function(x, y, z)
 
 	if (d3_1 < 0.05 or d3_2 < .02) and distSquaredList[1] > .3 then
 		return c_crystal
-	elseif d4_1 < 0.08 then
+	elseif (distSquaredList[4] - distSquaredList[1]) < 0.08 then
 		return c_glowstone
+	else
+		return c_air
 	end
-
-	return c_air
 end

nodes.lua

@@ -207,8 +207,8 @@ minetest.register_node("nether:geodelite", {
 		scale       = 4
 	}},
 	light_source = 2,
-	is_ground_content = true,
 	drop = "nether:geode",
+	is_ground_content = true,
 	groups = {cracky = 3, oddly_breakable_by_hand = 3, nether_crystal = 1},
 	sounds = default.node_sound_glass_defaults(),
 })
@@ -216,10 +216,17 @@ minetest.register_node("nether:geodelite", {
 if minetest.get_modpath("xpanes") and minetest.global_exists("xpanes") and xpanes.register_pane ~= nil then
 	xpanes.register_pane("nether_crystal_pane", {
 		description = S("Nether Crystal Pane"),
-		textures = {"nether_geode_glass.png", "", "xpanes_edge_obsidian.png"},
-		inventory_image = "nether_geode_glass.png",
-		wield_image = "nether_geode_glass.png",
-		use_texture_alpha = true,
+		textures = {
+			{
+				name        = "nether_geode_glass.png",
+				align_style = "world",
+				scale       = 2
+			},
+			"",
+			"xpanes_edge_obsidian.png"
+		},
+		inventory_image = "([combine:32x32:-8,-8=nether_geode_glass.png:24,-8=nether_geode_glass.png:-8,24=nether_geode_glass.png:24,24=nether_geode_glass.png)^[resize:16x16^[multiply:#922^default_obsidian_glass.png",
+		wield_image     = "([combine:32x32:-8,-8=nether_geode_glass.png:24,-8=nether_geode_glass.png:-8,24=nether_geode_glass.png:24,24=nether_geode_glass.png)^[resize:16x16^[multiply:#922^default_obsidian_glass.png",		use_texture_alpha = true,
 		sounds = default.node_sound_glass_defaults(),
 		groups = {snappy=2, cracky=3, oddly_breakable_by_hand=3},
 		recipe = {