diff --git a/src/Gui/SoFCOffscreenRenderer.cpp b/src/Gui/SoFCOffscreenRenderer.cpp
index b89bcd7b51..4b6524124a 100644
--- a/src/Gui/SoFCOffscreenRenderer.cpp
+++ b/src/Gui/SoFCOffscreenRenderer.cpp
@@ -818,6 +818,9 @@ SoQtOffscreenRenderer::writeToImage (QImage& img) const
             }
         }
     }
+    else if (PRIVATE(this)->backgroundcolor[3] == 1.0) {
+        img = img.convertToFormat(QImage::Format_RGB32);
+    }
 }
 
 /*!
diff --git a/src/Gui/View3DInventorViewer.cpp b/src/Gui/View3DInventorViewer.cpp
index 13a9b46312..ed57bfc920 100644
--- a/src/Gui/View3DInventorViewer.cpp
+++ b/src/Gui/View3DInventorViewer.cpp
@@ -2111,7 +2111,8 @@ void View3DInventorViewer::imageFromFramebuffer(int width, int height, int sampl
                 bits++;
             }
         }
-    }
+    } else if (alpha == 255)
+        img = img.convertToFormat(QImage::Format_RGB32);
 }
 
 void View3DInventorViewer::renderToFramebuffer(QtGLFramebufferObject* fbo)