diff --git a/HMCL/src/main/java/org/jackhuang/hmcl/ui/decorator/DecoratorController.java b/HMCL/src/main/java/org/jackhuang/hmcl/ui/decorator/DecoratorController.java
index ca2b973a2..6ae116ebd 100644
--- a/HMCL/src/main/java/org/jackhuang/hmcl/ui/decorator/DecoratorController.java
+++ b/HMCL/src/main/java/org/jackhuang/hmcl/ui/decorator/DecoratorController.java
@@ -61,10 +61,12 @@ import java.util.Random;
 import java.util.logging.Level;
 import java.util.stream.Stream;
 
+import static java.util.logging.Level.WARNING;
 import static java.util.stream.Collectors.toList;
 import static org.jackhuang.hmcl.setting.ConfigHolder.config;
 import static org.jackhuang.hmcl.ui.FXUtils.newImage;
 import static org.jackhuang.hmcl.util.Logging.LOG;
+import static org.jackhuang.hmcl.util.io.FileUtils.getExtension;
 
 public class DecoratorController {
     private static final String PROPERTY_DIALOG_CLOSE_HANDLER = DecoratorController.class.getName() + ".dialog.closeListener";
@@ -174,10 +176,10 @@ public class DecoratorController {
         List<Path> candidates;
         try (Stream<Path> stream = Files.list(imageDir)) {
             candidates = stream
-                .filter(Files::isRegularFile)
+                .filter(Files::isReadable)
                     .filter(it -> {
-                        String filename = it.getFileName().toString();
-                        return filename.endsWith(".png") || filename.endsWith(".jpg");
+                        String ext = getExtension(it).toLowerCase();
+                        return ext.equals("png") || ext.equals("jpg");
                     })
                     .collect(toList());
         } catch (IOException e) {
@@ -199,13 +201,23 @@ public class DecoratorController {
     }
 
     private Optional<Image> tryLoadImage(Path path) {
-        if (Files.isRegularFile(path)) {
-            try {
-                return Optional.of(new Image(path.toAbsolutePath().toUri().toString()));
-            } catch (IllegalArgumentException ignored) {
-            }
+        if (!Files.isReadable(path))
+            return Optional.empty();
+
+        Image img;
+        try {
+            img = new Image(path.toAbsolutePath().toUri().toString());
+        } catch (IllegalArgumentException e) {
+            LOG.log(WARNING, "Couldn't load background image", e);
+            return Optional.empty();
         }
-        return Optional.empty();
+
+        if (img.getException() != null) {
+            LOG.log(WARNING, "Couldn't load background image", img.getException());
+            return Optional.empty();
+        }
+
+        return Optional.of(img);
     }
 
     // ==== Navigation ====