diff --git a/dcc/config.py b/dcc/config.py
index ae2487a..03243b6 100644
--- a/dcc/config.py
+++ b/dcc/config.py
@@ -28,6 +28,7 @@ class ConfigBase(object):
         self._init_attr(["thumbnail", "font"], None)
         self._init_attr(["thumbnail", "text_fill"], "white")
         self._init_attr(["thumbnail", "text_stroke"], "red")
+        self._init_attr(["thumbnail", "overlay_name"], "M_DOOM_scaled.png")
         self._init_attr(
             ["fetch", "mirror"],
             "https://youfailit.net/pub/idgames"
diff --git a/dcc/doom_base.py b/dcc/doom_base.py
index d3400ff..aedae79 100644
--- a/dcc/doom_base.py
+++ b/dcc/doom_base.py
@@ -69,6 +69,12 @@ class Wad(dcc.config.Base):
             return ["-assign", ",".join(options)]
         return []
 
+    def thumb_overlay_path(self):
+        return (
+            self._ensure(self.fabricate.joinpath(self.wad))
+            .joinpath(self.thumbnail_overlay_name)
+        )
+
 
 class WadMap(Wad):
     def get_parser(self, prog_name):
@@ -82,7 +88,7 @@ class WadMap(Wad):
         self._name = parsed_args.name
         self.wad_init(parsed_args)
 
-        self.take_action(parsed_args)
+        return self.take_action(parsed_args)
 
     @property
     def map(self):
@@ -162,12 +168,6 @@ class WadMap(Wad):
             .joinpath(self._file_base("_base.png"))
         )
 
-    def m_doom_path(self):
-        return (
-            self._ensure(self.fabricate.joinpath(self.wad))
-            .joinpath("M_DOOM_scaled.png")
-        )
-
     def text_thumb_path(self):
         return (
             self._ensure(self.fabricate.joinpath(self.wad))
diff --git a/dcc/thumb.py b/dcc/thumb.py
index 9240756..d5faf15 100644
--- a/dcc/thumb.py
+++ b/dcc/thumb.py
@@ -13,7 +13,7 @@ class Thumb(dcc.doom_base.WadMap):
     def take_action(self, parsed_args):
         base = self.base_thumb_path()
         text = self.text_thumb_path()
-        mdoom = self.m_doom_path()
+        overlay = self.thumnail_overlay_path()
         with (
             wand.image.Image(filename=base) as bi,
             wand.color.Color("transparent") as tc
@@ -22,7 +22,7 @@ class Thumb(dcc.doom_base.WadMap):
                 ti.border(tc, 5, 5)
                 bi.composite(ti, gravity="south_west")
 
-            with wand.image.Image(filename=mdoom) as mdi:
+            with wand.image.Image(filename=overlay) as mdi:
                 mdi.border(tc, 5, 5)
                 bi.composite(mdi, gravity="north_west")