diff --git a/plate-tool-eframe/src/plate.rs b/plate-tool-eframe/src/plate.rs
index b08cc89..786d467 100644
--- a/plate-tool-eframe/src/plate.rs
+++ b/plate-tool-eframe/src/plate.rs
@@ -35,16 +35,16 @@ impl Default for PlateUiState {
     }
 }
 
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Debug)]
 struct WellInfo {
     volume: f32,
-    color: [f64; 3],
+    color: Vec<[f64; 3]>,
     highlight: bool,
     fill: bool,
 }
 
 impl WellInfo {
-    fn new(volume: f32, color: [f64; 3]) -> Self {
+    fn new(volume: f32, color: Vec<[f64; 3]>) -> Self {
         WellInfo {
             volume,
             color,
@@ -61,6 +61,7 @@ pub struct PlateDisplayOptions {
     pub show_well_volumes: bool,
     pub show_volume_heatmap: bool,
     pub show_coordinates: bool,
+    pub show_pie_piece_shading: bool,
 }
 impl Default for PlateDisplayOptions {
     fn default() -> Self {
@@ -69,6 +70,7 @@ impl Default for PlateDisplayOptions {
             show_well_volumes: true,
             show_volume_heatmap: false,
             show_coordinates: true,
+            show_pie_piece_shading: true,
         }
     }
 }
@@ -202,10 +204,10 @@ fn calculate_shading_for_wells(
                             // Well info already existed.
                             x.volume += volume;
 
-                            x.color = if display_options.show_volume_heatmap {
-                                PALETTE.get_linear(x.volume.into(), max_volume.into())
+                            if display_options.show_volume_heatmap {
+                                x.color = vec![PALETTE.get_linear(x.volume.into(), max_volume.into())];
                             } else {
-                                PALETTE.get_ordered(transfer.id, ordered_ids)
+                                x.color.push(PALETTE.get_ordered(transfer.id, ordered_ids));
                             };
                         } else {
                             // Well info does not already exist, we need to make it.
@@ -216,9 +218,9 @@ fn calculate_shading_for_wells(
                                 *wi = Some(WellInfo::new(
                                     volume,
                                     if display_options.show_volume_heatmap {
-                                        PALETTE.get_linear(volume.into(), max_volume.into())
+                                        vec![PALETTE.get_linear(volume.into(), max_volume.into())]
                                     } else {
-                                        PALETTE.get_ordered(transfer.id, ordered_ids)
+                                        vec![PALETTE.get_ordered(transfer.id, ordered_ids)]
                                     },
                                 ));
                             }
@@ -253,6 +255,45 @@ fn draw_cross(painter: &egui::Painter, center: egui::Pos2, radius: f32, stroke:
     painter.line_segment([pts[1], pts[3]], stroke);
 }
 
+fn draw_multicolor_circle(
+    painter: &egui::Painter,
+    center: egui::Pos2,
+    radius: f32,
+    colors: &[[f64; 3]],
+) {
+    if colors.is_empty() {
+        return;
+    }
+
+    let adjusted_radius = radius * 0.80f32;
+    let angle_per_slice_rad = std::f32::consts::TAU / colors.len() as f32;
+
+    for (index, color) in colors.iter().enumerate() {
+        let start_angle = index as f32 * angle_per_slice_rad;
+        let stop_angle = (index + 1) as f32 * angle_per_slice_rad;
+
+        let mut points = vec![center];
+
+        const NUM_POINTS: u8 = 32;
+
+        for j in 0..=NUM_POINTS {
+            let t = j as f32 / NUM_POINTS as f32;
+            let angle = start_angle + t * angle_per_slice_rad;
+            let x = center.x + adjusted_radius * angle.cos();
+            let y = center.y + adjusted_radius * angle.sin();
+            points.push(egui::pos2(x, y));
+        }
+
+        points.push(center);
+
+        painter.add(egui::Shape::convex_polygon(
+            points,
+            f64_to_color32(*color),
+            egui::Stroke::NONE,
+        ));
+    }
+}
+
 fn add_plate_sub(
     size: egui::Vec2,
     rows: u8,
@@ -371,9 +412,11 @@ fn add_plate_sub(
                 if let Some(mut well_info) =
                     well_infos.get_mut((w.0 - 1) * columns as usize + (w.1 - 1))
                 {
-                    let volume = well_info.map(|x| x.volume).unwrap_or(0.0);
-                    let color = well_info.map(|x| x.color).unwrap_or([255.0, 255.0, 255.0]);
-                    let fill = well_info.map(|x| x.color).is_some();
+                    let (volume, color, fill) = if let Some(ref info) = well_info {
+                        (info.volume, info.color.clone(), info.fill)
+                    } else {
+                        (0.0, vec![[255.0, 255.0, 255.0]], false)
+                    };
 
                     *well_info = Some(WellInfo {
                         color,
@@ -414,10 +457,20 @@ fn add_plate_sub(
             //
 
             if let Some(well_info) =
-                well_infos[(c_row - 1) as usize * columns as usize + (c_column - 1) as usize]
+                &well_infos[(c_row - 1) as usize * columns as usize + (c_column - 1) as usize]
             {
                 if well_info.fill {
-                    painter.circle_filled(center, radius * 0.80, f64_to_color32(well_info.color));
+                    if display_options.show_pie_piece_shading && !display_options.show_volume_heatmap {
+                        draw_multicolor_circle(&painter, center, radius, &well_info.color);
+                    } else {
+                        painter.circle_filled(
+                            center,
+                            radius * 0.80,
+                            f64_to_color32(
+                                *well_info.color.first().unwrap_or(&[255.0, 255.0, 255.0]),
+                            ),
+                        );
+                    }
                 }
                 if well_info.highlight && display_options.show_transfer_hashes {
                     draw_cross(&painter, center, radius * 0.80, *STROKE_CURRENT);
@@ -428,7 +481,7 @@ fn add_plate_sub(
 
             if display_options.show_well_volumes {
                 if let Some(well_info) =
-                    well_infos[(c_row - 1) as usize * columns as usize + (c_column - 1) as usize]
+                    &well_infos[(c_row - 1) as usize * columns as usize + (c_column - 1) as usize]
                 {
                     painter.text(
                         center,
diff --git a/plate-tool-eframe/src/upper_menu.rs b/plate-tool-eframe/src/upper_menu.rs
index e526213..3799c9f 100644
--- a/plate-tool-eframe/src/upper_menu.rs
+++ b/plate-tool-eframe/src/upper_menu.rs
@@ -206,6 +206,12 @@ fn render_options_menu(
             &mut main_window_state.plate_display_options.show_well_volumes,
             "Show volumes in wells",
         );
+        ui.toggle_value(
+            &mut main_window_state
+                .plate_display_options
+                .show_pie_piece_shading,
+            "Show well shading as pie pieces",
+        );
         ui.toggle_value(
             &mut main_window_state.plate_display_options.show_volume_heatmap,
             "Toggle volume heatmap",