diff --git a/meshroom/ui/components/thumbnail.py b/meshroom/ui/components/thumbnail.py
index c809f01d..e9ec5fe6 100644
--- a/meshroom/ui/components/thumbnail.py
+++ b/meshroom/ui/components/thumbnail.py
@@ -271,3 +271,11 @@ class ThumbnailCache(QObject):
             # No more request to process
             # Unregister worker thread
             ThumbnailCache.activeWorkerThreads -= 1
+
+    @Slot()
+    def clearRequests(self):
+        """Clear all pending thumbnail creation requests.
+
+        Requests already under treatment by a worker thread will still be completed.
+        """
+        ThumbnailCache.requests.clear()
diff --git a/meshroom/ui/qml/ImageGallery/ImageGallery.qml b/meshroom/ui/qml/ImageGallery/ImageGallery.qml
index 1ded88b0..d710375b 100644
--- a/meshroom/ui/qml/ImageGallery/ImageGallery.qml
+++ b/meshroom/ui/qml/ImageGallery/ImageGallery.qml
@@ -39,6 +39,10 @@ Panel {
         property variant viewpoints: currentCameraInit ? currentCameraInit.attribute('viewpoints').value : undefined
         property variant intrinsics: currentCameraInit ? currentCameraInit.attribute('intrinsics').value : undefined
         property bool readOnly: root.readOnly || displayHDR.checked
+
+        onViewpointsChanged: {
+            ThumbnailCache.clearRequests();
+        }
     }
 
     property variant parsedIntrinsic