Change obsidian glass drawtype to glasslike_framed_optional

mods/default/nodes.lua

@@ -1648,8 +1648,9 @@ minetest.register_node("default:glass", {
 
 minetest.register_node("default:obsidian_glass", {
 	description = "Obsidian Glass",
-	drawtype = "glasslike",
-	tiles = {"default_obsidian_glass.png"},
+	drawtype = "glasslike_framed_optional",
+	tiles = {"default_obsidian_glass.png", "default_obsidian_glass_detail.png"},
+	inventory_image = minetest.inventorycube("default_obsidian_glass.png"),
 	paramtype = "light",
 	is_ground_content = false,
 	sunlight_propagates = true,