diff --git a/src/components/tool-options-panel/tool-options-fill/messages.json b/src/components/tool-options-panel/tool-options-fill/messages.json
index 2fe7598..d2a99d7 100644
--- a/src/components/tool-options-panel/tool-options-fill/messages.json
+++ b/src/components/tool-options-panel/tool-options-fill/messages.json
@@ -2,6 +2,8 @@
     "en-US": {
         "fill": "Fill",
         "smartFill": "Use smart fill",
-        "smartFillExpl": "When using smart fill, the area surrounding the fill origin will be filled until a boundary has been recognized."
+        "smartFillExpl": "When using smart fill, the area surrounding the fill origin will be filled until a boundary has been recognized.",
+        "feather": "Feather",
+        "threshold": "Threshold"
     }
 }
diff --git a/src/components/tool-options-panel/tool-options-fill/tool-options-fill.vue b/src/components/tool-options-panel/tool-options-fill/tool-options-fill.vue
index 0af68d1..c556cb5 100644
--- a/src/components/tool-options-panel/tool-options-fill/tool-options-fill.vue
+++ b/src/components/tool-options-panel/tool-options-fill/tool-options-fill.vue
@@ -1,7 +1,7 @@
 /**
  * The MIT License (MIT)
  *
- * Igor Zinken 2022 - https://www.igorski.nl
+ * Igor Zinken 2022-2026 - https://www.igorski.nl
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
@@ -32,18 +32,41 @@
             />
         </div>
         <p v-t="'smartFillExpl'" class="expl"></p>
+        <div class="wrapper wrapper--slider">
+            <label v-t="'feather'"></label>
+            <slider
+                v-model="feather"
+                :min="0"
+                :max="50"
+                :disabled="disabled || !smartFill"
+                :tooltip="'none'"
+            />
+        </div>
+        <div class="wrapper wrapper--slider">
+            <label v-t="'threshold'"></label>
+            <slider
+                v-model="threshold"
+                :min="0"
+                :max="100"
+                :disabled="disabled || !smartFill"
+                :tooltip="'none'"
+            />
+        </div>
     </div>
 </template>
 
 <script lang="ts">
 import { mapGetters, mapMutations } from "vuex";
 import ToggleButton from "@/components/third-party/vue-js-toggle-button/ToggleButton.vue";
+import Slider from "@/components/ui/slider/slider.vue";
+import { type FillToolOptions } from "@/options/editor";
 import ToolTypes, { canDraw } from "@/definitions/tool-types";
 import messages from "./messages.json";
 
 export default {
     i18n: { messages },
     components: {
+        Slider,
         ToggleButton,
     },
     computed: {
@@ -56,23 +79,42 @@ export default {
         disabled(): boolean {
             return !canDraw( this.activeDocument, this.activeLayer, this.activeLayerMask );
         },
+        feather: {
+            get(): number {
+                return this.fillOptions.feather;
+            },
+            set( value: number ): void {
+                this.update( "feather", value );
+            },
+        },
         smartFill: {
             get(): boolean {
                 return this.fillOptions.smartFill;
             },
             set( value: boolean ): void {
-                this.setToolOptionValue({
-                    tool: ToolTypes.FILL,
-                    option: "smartFill",
-                    value
-                });
-            }
-        }
+                this.update( "smartFill", value );
+            },
+        },
+        threshold: {
+            get(): number {
+                return this.fillOptions.threshold;
+            },
+            set( value: number ): void {
+                this.update( "threshold", value );
+            },
+        },
     },
     methods: {
         ...mapMutations([
             "setToolOptionValue",
         ]),
+        update( option: Partial<FillToolOptions>, value: boolean | number ): void {
+            this.setToolOptionValue({
+                tool: ToolTypes.FILL,
+                option,
+                value
+            });
+        },
     },
 };
 </script>
diff --git a/src/definitions/editor.ts b/src/definitions/editor.ts
index b923cc4..800d6e9 100644
--- a/src/definitions/editor.ts
+++ b/src/definitions/editor.ts
@@ -136,6 +136,8 @@ export type SelectionToolOptions = {
 
 export type FillToolOptions = {
     smartFill: boolean;
+    feather: number;
+    threshold: number;
 };
 
 export type WandToolOptions = {
diff --git a/src/rendering/actors/layer-renderer.ts b/src/rendering/actors/layer-renderer.ts
index 7c80337..46232b2 100644
--- a/src/rendering/actors/layer-renderer.ts
+++ b/src/rendering/actors/layer-renderer.ts
@@ -355,9 +355,10 @@ export default class LayerRenderer extends ZoomableSprite {
             if ( this.toolOptions.smartFill ) {
                 // we need to translate pointer offset to match the relative, untransformed source layer content
                 const point = rotatePointer( this._pointer, this.layer, width, height );
-                floodFill( ctx, point.x, point.y, color );
+                const { fillOptions } = this.getStore().getters;
+                floodFill( ctx, point.x, point.y, color, fillOptions.feather, fillOptions.threshold );
             } else {
-                ctx.fillStyle = this.getStore().getters.activeColor;
+                ctx.fillStyle = color;
                 if ( selection ) {
                     ctx.fill();
                 } else {
diff --git a/src/rendering/operations/fill.ts b/src/rendering/operations/fill.ts
index 7838561..17833f1 100644
--- a/src/rendering/operations/fill.ts
+++ b/src/rendering/operations/fill.ts
@@ -1,7 +1,7 @@
 /**
  * The MIT License (MIT)
  *
- * Igor Zinken 2022-2023 - https://www.igorski.nl
+ * Igor Zinken 2022-2026 - https://www.igorski.nl
  *
  * Permission is hereby granted, free of charge, to any person obtaining a copy of
  * this software and associated documentation files (the "Software"), to deal in
@@ -35,10 +35,12 @@ const TWO_PI = Math.PI * 2;
  * @param {Number} sourceY y-coordinate of the fill origin
  * @param {String} fillColor RGBA String value for the fill color
  * @param {Number=} feather optional amount of pixels at edges to fill (less aliased result)
+ * @param {Number=} threshold optional threshold to apply to the color selection
  */
-export const floodFill = ( ctx: CanvasRenderingContext2D, sourceX: number, sourceY: number,
-    fillColor: string, feather = 5 ): void => {
-    const path = selectByColor( ctx.canvas, sourceX, sourceY );
+export const floodFill = (
+    ctx: CanvasRenderingContext2D, sourceX: number, sourceY: number, fillColor: string, feather = 5, threshold = 0,
+): void => {
+    const path = selectByColor( ctx.canvas, sourceX, sourceY, threshold );
 
     ctx.strokeStyle = fillColor;
     ctx.fillStyle   = fillColor;
diff --git a/src/store/modules/editor-module.ts b/src/store/modules/editor-module.ts
index f4f21a4..2fe90cf 100644
--- a/src/store/modules/editor-module.ts
+++ b/src/store/modules/editor-module.ts
@@ -63,7 +63,7 @@ export const createEditorState = ( props?: Partial<EditorState> ): EditorState =
         [ ToolTypes.ERASER ]: { size: 10, type: BrushTypes.PAINT_BRUSH, opacity: 1, thickness: .5 },
         [ ToolTypes.CLONE ] : { size: 10, type: BrushTypes.PAINT_BRUSH, opacity: .75, thickness: .5, sourceLayerId: TOOL_SRC_MERGED, coords: null },
         [ ToolTypes.SELECTION ] : { lockRatio: false, xRatio: 1, yRatio: 1 },
-        [ ToolTypes.FILL ] : { smartFill: true },
+        [ ToolTypes.FILL ] : { smartFill: true, feather: 5, threshold: 0 },
         [ ToolTypes.WAND ] : { threshold: 50, sampleMerged: true },
     },
     snapAlign : true,
diff --git a/tests/unit/store/modules/editor-module.spec.ts b/tests/unit/store/modules/editor-module.spec.ts
index aaebb31..dc4626f 100644
--- a/tests/unit/store/modules/editor-module.spec.ts
+++ b/tests/unit/store/modules/editor-module.spec.ts
@@ -17,7 +17,7 @@ describe( "Vuex editor module", () => {
         [ ToolTypes.ERASER ]: { size: 10, type: BrushTypes.PAINT_BRUSH, opacity: 1, thickness: .5 },
         [ ToolTypes.CLONE ] : { size: 10, type: BrushTypes.PAINT_BRUSH, opacity: 1, thickness: .5, sourceLayerId: TOOL_SRC_MERGED, coords: { x: 10, y: 15 } },
         [ ToolTypes.SELECTION ] : { lockRatio: false, xRatio: 1, yRatio: 1 },
-        [ ToolTypes.FILL ] : { smartFill: true },
+        [ ToolTypes.FILL ] : { smartFill: true, feather: 5, threshold: 0 },
         [ ToolTypes.WAND ] : { threshold: 15, sampleMerged: true },
     };