photos named via item_name instead of custom_name so the recipe book fills the copy recipe, copies keep an anvil name

src/main/java/eu/mhsl/minecraft/pixelpics/survival/CameraItems.java

@@ -92,6 +92,10 @@ public final class CameraItems {
                 && meta.getMapView().getId() == mapId;
     }
 
+    /**
+     * The photo's name, set as ITEM_NAME: a CUSTOM_NAME would keep the recipe book from placing the photo (vanilla
+     * Inventory.isUsableForCrafting skips custom-named stacks for the copy recipe's material ingredient).
+     */
     public static Component photoDisplayName() {
         return plain("Foto", NamedTextColor.WHITE);
     }

src/main/java/eu/mhsl/minecraft/pixelpics/survival/CraftingListener.java

@@ -124,7 +124,8 @@ public class CraftingListener implements Listener {
                         key,
                         PersistentDataType.STRING,
                         src.getPersistentDataContainer().get(key, PersistentDataType.STRING));
-        dst.displayName(CameraItems.photoDisplayName());
+        dst.itemName(CameraItems.photoDisplayName());
+        if (src.hasCustomName()) dst.customName(src.customName()); // anvil-renamed photo
         copy.setItemMeta(dst);
         return copy;
     }

src/main/java/eu/mhsl/minecraft/pixelpics/survival/PhotoService.java

@@ -88,7 +88,7 @@ public final class PhotoService {
                             PersistentDataType.STRING,
                             UUID.randomUUID().toString());
             meta.setMapView(mapView);
-            meta.displayName(CameraItems.photoDisplayName());
+            meta.itemName(CameraItems.photoDisplayName());
             map.setItemMeta(meta);
             CameraItems.give(player, map);
             playShutter(player);