diff --git a/crates/egui/src/layers.rs b/crates/egui/src/layers.rs
index 914f8240..f448436a 100644
--- a/crates/egui/src/layers.rs
+++ b/crates/egui/src/layers.rs
@@ -267,15 +267,26 @@ impl PaintList {
         self.0.is_empty()
     }
 
-    /// Returns the index of the new [`Shape`] that can be used with `PaintList::set`.
+    /// Returns the index of the new [`Shape`] at index `z` that can be used with `PaintList::set`.
     #[inline(always)]
-    pub fn add(&mut self, clip_rect: Rect, shape: Shape, z: ZOrder) -> ShapeIdx {
+    pub fn add_at_z(&mut self, clip_rect: Rect, shape: Shape, z: ZOrder) -> ShapeIdx {
         let idx = ShapeIdx(self.0.len());
         self.0.push((z, ClippedShape(clip_rect, shape)));
         idx
     }
 
-    pub fn extend<I: IntoIterator<Item = Shape>>(&mut self, clip_rect: Rect, shapes: I, z: ZOrder) {
+    /// Returns the index of the new [`Shape`] at base z-index that can be used with `PaintList::set`.
+    #[inline(always)]
+    pub fn add(&mut self, clip_rect: Rect, shape: Shape) -> ShapeIdx {
+        self.add_at_z(clip_rect, shape, ZOrder::base())
+    }
+
+    pub fn extend_at_z<I: IntoIterator<Item = Shape>>(
+        &mut self,
+        clip_rect: Rect,
+        shapes: I,
+        z: ZOrder,
+    ) {
         self.0.extend(
             shapes
                 .into_iter()
@@ -283,6 +294,10 @@ impl PaintList {
         );
     }
 
+    pub fn extend<I: IntoIterator<Item = Shape>>(&mut self, clip_rect: Rect, shapes: I) {
+        self.extend_at_z(clip_rect, shapes, ZOrder::base());
+    }
+
     /// Modify an existing [`Shape`].
     ///
     /// Sometimes you want to paint a frame behind some contents, but don't know how large the frame needs to be
diff --git a/crates/egui/src/painter.rs b/crates/egui/src/painter.rs
index eaae7156..37f3c452 100644
--- a/crates/egui/src/painter.rs
+++ b/crates/egui/src/painter.rs
@@ -197,12 +197,13 @@ impl Painter {
     }
 
     fn add_to_paint_list(&self, shape: Shape) -> ShapeIdx {
-        self.paint_list().add(self.clip_rect, shape, self.layer.z)
+        self.paint_list()
+            .add_at_z(self.clip_rect, shape, self.layer.z)
     }
 
     fn extend_paint_list(&self, shapes: impl IntoIterator<Item = Shape>) {
         self.paint_list()
-            .extend(self.clip_rect, shapes, self.layer.z);
+            .extend_at_z(self.clip_rect, shapes, self.layer.z);
     }
 
     fn set_shape_in_paint_list(&self, idx: ShapeIdx, shape: Shape) {