diff --git a/main.json b/main.json
index 6b81e68..8e241b5 100644
--- a/main.json
+++ b/main.json
@@ -228,6 +228,12 @@
          "imagewidth":1920,
          "margin":0,
          "name":"rc3-2021-mullana-background",
+         "properties":[
+                {
+                 "name":"tilesetCopyright",
+                 "type":"string",
+                 "value":"see RC3 tiles"
+                }],
          "spacing":0,
          "tilecount":3600,
          "tileheight":32,
@@ -241,6 +247,12 @@
          "imagewidth":1920,
          "margin":0,
          "name":"rc3-2021-mullana-ground",
+         "properties":[
+                {
+                 "name":"tilesetCopyright",
+                 "type":"string",
+                 "value":"see RC3 tiles"
+                }],
          "spacing":0,
          "tilecount":3600,
          "tileheight":32,
@@ -254,6 +266,12 @@
          "imagewidth":960,
          "margin":0,
          "name":"rc3-2021-mullana-utility",
+         "properties":[
+                {
+                 "name":"tilesetCopyright",
+                 "type":"string",
+                 "value":"see RC3 tiles"
+                }],
          "spacing":0,
          "tilecount":1200,
          "tileheight":32,
@@ -267,6 +285,12 @@
          "imagewidth":64,
          "margin":0,
          "name":"worldExit",
+         "properties":[
+                {
+                 "name":"tilesetCopyright",
+                 "type":"string",
+                 "value":"see RC3 tiles"
+                }],
          "spacing":0,
          "tilecount":4,
          "tileheight":32,
@@ -388,6 +412,11 @@
                          "name":"collides",
                          "type":"bool",
                          "value":true
+                        }, 
+                        {
+                         "name":"tilesetCopyright",
+                         "type":"string",
+                         "value":"free"
                         }]
                 }],
          "tilewidth":32