diff --git a/tgbot/kollagen-bot/main.py b/tgbot/kollagen-bot/main.py
index a9346e2..75f38e6 100644
--- a/tgbot/kollagen-bot/main.py
+++ b/tgbot/kollagen-bot/main.py
@@ -120,13 +120,17 @@ class KollagenBot:
             )
             return False
 
-        directories = [
-            (dir, os.path.join(self.base_dir or "./", dir)) for dir in args.directories
-        ]
-
-        for orig_dir, full_path in directories:
-            if not os.path.exists(full_path):
-                raise FileNotFoundError(f'"{orig_dir}" does not exist.')
+        directories = []
+        for dir in args.directories:
+            for possible in [
+                os.path.join(self.base_dir or "./", dir),
+                os.path.join(self.base_dir or "./", dir.upper()),
+            ]:
+                if os.path.exists(possible):
+                    directories.append(possible)
+                    break
+            else:
+                raise FileNotFoundError(f'"{dir}" does not exist.')
 
         mode = ["-m", args.mode] if args.mode else []
         num_images = ["-n", str(args.num_images)] if args.num_images else []
@@ -135,7 +139,7 @@ class KollagenBot:
             shell_cmd_line = [
                 self.kollagen_path,
                 "-r",
-                *[full_path for _, full_path in directories],
+                *directories,
                 "-w",
                 str(args.width),
                 "-h",