diff --git a/alt1/default_sign_wall.png b/alt1/default_sign_wall.png
new file mode 100644
index 0000000..442f48a
Binary files /dev/null and b/alt1/default_sign_wall.png differ
diff --git a/default_sign_wall.png b/default_sign_wall.png
index 442f48a..828a62b 100644
Binary files a/default_sign_wall.png and b/default_sign_wall.png differ
diff --git a/unknown_item.png b/unknown_item.png
new file mode 100644
index 0000000..9f7c6fd
Binary files /dev/null and b/unknown_item.png differ
diff --git a/unknown_node.png b/unknown_node.png
new file mode 100644
index 0000000..d4b2261
Binary files /dev/null and b/unknown_node.png differ