datapacks/Bat_Membranes_1.0/data/minecraft/loot_tables/entities/bat.json

@@ -0,0 +1,43 @@
+{
+  "type": "minecraft:entity",
+  "pools": [
+    {
+      "rolls": 1,
+      "entries": [
+        {
+          "type": "minecraft:item",
+          "functions": [
+            {
+              "function": "minecraft:set_count",
+              "count": {
+                "min": 0.0,
+                "max": 1.0,
+                "type": "minecraft:uniform"
+              }
+            },
+            {
+              "function": "minecraft:looting_enchant",
+              "count": {
+                "min": 0.0,
+                "max": 1.0
+              }
+            },
+			{
+			  "function": "minecraft:set_name",
+			  "name": {
+				"text": "Bat Membrane",
+				"italic": "false"
+			  }
+			}			
+          ],
+          "name": "minecraft:phantom_membrane"
+        }
+      ],
+      "conditions": [
+        {
+          "condition": "minecraft:killed_by_player"
+        }
+      ]
+    }
+  ]
+}

datapacks/Bat_Membranes_1.0/pack.mcmeta

@@ -0,0 +1,6 @@
+{
+  "pack": {
+    "pack_format": 3,
+    "description": "Bats drop membranes, they also have wings you know."
+  }
+}