diff --git a/.gitattributes b/.gitattributes
index 32e52e4..730a247 100644
--- a/.gitattributes
+++ b/.gitattributes
@@ -55,6 +55,8 @@ icons/show_task.png -text
 icons/show_task_min.png -text
 icons/slice.png -text
 icons/slice_original.png -text
+icons/slice_plane.png -text
+icons/slice_plane_original.png -text
 icons/surface_export.png -text
 icons/surface_export_original.png -text
 icons/tool_annotation.png -text
diff --git a/icons/slice_plane.png b/icons/slice_plane.png
new file mode 100644
index 0000000..2923def
Binary files /dev/null and b/icons/slice_plane.png differ
diff --git a/icons/slice_plane_original.png b/icons/slice_plane_original.png
new file mode 100644
index 0000000..df6c656
Binary files /dev/null and b/icons/slice_plane_original.png differ
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libgit2 0.21.2