diff --git a/src/components/ObliqueSliceViewer.vue b/src/components/ObliqueSliceViewer.vue
index 60b17faef..492acff73 100644
--- a/src/components/ObliqueSliceViewer.vue
+++ b/src/components/ObliqueSliceViewer.vue
@@ -145,10 +145,15 @@ watchEffect(() => {
 // setup plane origin/normal
 const planeOrigin = vtkFieldRef(resliceCursorState, {
   get: () => resliceCursorState.getCenter(),
-  set: (v) => resliceCursor.setCenter(v),
+  set: (v) => {
+    resliceCursor.setCenter(v);
+    return true;
+  },
 });
 const planes = vtkFieldRef(resliceCursorState, 'planes');
-const planeNormal = computed(() => planes.value[widgetViewType.value].normal);
+// The reslice cursor is created with the default X/Y/Z planes, so the entry
+// for this view's type is always present.
+const planeNormal = computed(() => planes.value[widgetViewType.value]!.normal);
 
 // slicing domain/range
 
diff --git a/src/components/tools/ResliceCursorTool.vue b/src/components/tools/ResliceCursorTool.vue
index eeb4258c4..26cde5722 100644
--- a/src/components/tools/ResliceCursorTool.vue
+++ b/src/components/tools/ResliceCursorTool.vue
@@ -1,9 +1,17 @@
 <script setup lang="ts">
 import { computed, inject, ref, toRefs } from 'vue';
-import {
-  vtkResliceCursorViewWidget,
-  ResliceCursorWidgetState,
-} from '@kitware/vtk.js/Widgets/Widgets3D/ResliceCursorWidget';
+import { vtkResliceCursorWidgetDefaultInstance } from '@kitware/vtk.js/Widgets/Widgets3D/ResliceCursorWidget/behavior';
+import { vtkColor3MixinState } from '@kitware/vtk.js/Widgets/Core/StateBuilder/color3Mixin';
+import { vtkScale1MixinState } from '@kitware/vtk.js/Widgets/Core/StateBuilder/scale1Mixin';
+import { vtkScale3MixinState } from '@kitware/vtk.js/Widgets/Core/StateBuilder/scale3Mixin';
+
+// The reslice cursor builds its sphere handles from the color3/scale1 mixins
+// and its line handles from the color3/scale3 mixins.
+type SphereHandleState = vtkColor3MixinState & vtkScale1MixinState;
+type LineHandleState = vtkColor3MixinState & vtkScale3MixinState;
+// Per-axis label queries mix line handles (scale3) with rotation handles
+// (scale1), so only the color3 mixin is common to every result.
+type ColoredHandleState = vtkColor3MixinState;
 import { OBLIQUE_OUTLINE_COLORS } from '@/src/constants';
 import { getLPSAxisFromDir, getVTKViewTypeFromLPSAxis } from '@/src/utils/lps';
 import { LPSAxisDir } from '@/src/types/lps';
@@ -27,14 +35,14 @@ if (!view) throw new Error('No vtk view');
 const resliceCursorStore = useResliceCursorStore();
 const { resliceCursor, resliceCursorState } = resliceCursorStore;
 
-const widget = ref<vtkResliceCursorViewWidget>();
+const widget = ref<vtkResliceCursorWidgetDefaultInstance>();
 const vtkViewType = computed(() => getVTKViewTypeFromLPSAxis(viewAxis.value));
 
 onViewMounted(view.renderWindowView, () => {
   widget.value = view.widgetManager.addWidget(
     resliceCursor,
     vtkViewType.value
-  ) as vtkResliceCursorViewWidget;
+  ) as vtkResliceCursorWidgetDefaultInstance;
 
   widget.value.setKeepOrthogonality(true);
   // reset mouse cursor styles
@@ -45,13 +53,13 @@ onViewMounted(view.renderWindowView, () => {
   });
 
   resliceCursorState.getStatesWithLabel('sphere').forEach((handle) => {
-    const h = handle as ResliceCursorWidgetState;
+    const h = handle as SphereHandleState;
     h.setScale1(10);
     h.setOpacity(128);
   });
 
   resliceCursorState.getStatesWithLabel('line').forEach((handle) => {
-    const h = handle as ResliceCursorWidgetState;
+    const h = handle as LineHandleState;
     h.setScale3(1, 1, 1);
     h.setOpacity(100);
   });
@@ -61,7 +69,7 @@ onViewMounted(view.renderWindowView, () => {
     ...resliceCursorState.getStatesWithLabel('XinY'),
   ];
   xLines.forEach((handle) => {
-    const h = handle as ResliceCursorWidgetState;
+    const h = handle as ColoredHandleState;
     h.setColor3(OBLIQUE_OUTLINE_COLORS[InitViewIDs.ObliqueSagittal]);
   });
 
@@ -70,7 +78,7 @@ onViewMounted(view.renderWindowView, () => {
     ...resliceCursorState.getStatesWithLabel('YinX'),
   ];
   yLines.forEach((handle) => {
-    const h = handle as ResliceCursorWidgetState;
+    const h = handle as ColoredHandleState;
     h.setColor3(OBLIQUE_OUTLINE_COLORS[InitViewIDs.ObliqueCoronal]);
   });
 
@@ -79,7 +87,7 @@ onViewMounted(view.renderWindowView, () => {
     ...resliceCursorState.getStatesWithLabel('ZinY'),
   ];
   zLines.forEach((handle) => {
-    const h = handle as ResliceCursorWidgetState;
+    const h = handle as ColoredHandleState;
     h.setColor3(OBLIQUE_OUTLINE_COLORS[InitViewIDs.ObliqueAxial]);
   });
 
diff --git a/src/composables/useVolumeThumbnailing.ts b/src/composables/useVolumeThumbnailing.ts
index f3b5ba307..d70a77f8a 100644
--- a/src/composables/useVolumeThumbnailing.ts
+++ b/src/composables/useVolumeThumbnailing.ts
@@ -2,7 +2,7 @@ import { onBeforeUnmount, reactive, ref, watch } from 'vue';
 import { Mode as LookupTableProxyMode } from '@kitware/vtk.js/Proxy/Core/LookupTableProxy';
 import vtkImageData from '@kitware/vtk.js/Common/DataModel/ImageData';
 import vtkPiecewiseFunctionProxy from '@kitware/vtk.js/Proxy/Core/PiecewiseFunctionProxy';
-import vtkColorMaps from '@kitware/vtk.js/Rendering/Core/ColorTransferFunction/ColorMaps';
+import { getPresetByName } from '@/src/types/color-map-preset';
 import type { Vector3 } from '@kitware/vtk.js/types';
 import { createVolumeThumbnailer } from '../core/thumbnailers/volume-thumbnailer';
 import { useCameraOrientation } from './useCameraOrientation';
@@ -22,7 +22,7 @@ function resetOpacityFunction(
   // reset pwf proxy range
   pwfProxy.setDataRange(...dataRange);
 
-  const preset = vtkColorMaps.getPresetByName(presetName);
+  const preset = getPresetByName(presetName);
   if (preset.OpacityPoints) {
     const OpacityPoints = preset.OpacityPoints as number[];
     const points = [];
diff --git a/src/shims-vtk.d.ts b/src/shims-vtk.d.ts
deleted file mode 100644
index 37bed7f20..000000000
--- a/src/shims-vtk.d.ts
+++ /dev/null
@@ -1,310 +0,0 @@
-declare module '@kitware/vtk.js/vtk' {
-  import { vtkObject } from '@kitware/vtk.js/interfaces';
-
-  const vtk = (obj: any): vtkObject => {};
-  vtk.register = (vtkClassName: string, constructor: unknown): void => {};
-
-  export default vtk;
-}
-
-declare module '@kitware/vtk.js/Interaction/Style/InteractorStyleManipulator/Presets' {
-  export default any;
-}
-
-declare module '@kitware/vtk.js/Rendering/Core/ColorTransferFunction/ColorMaps' {
-  export declare const vtkColorMaps: {
-    addPreset(preset: any): void;
-    removePresetByName(name: string): void;
-    getPresetByName(name: string): any;
-    rgbPresetNames: string[];
-  };
-  export default vtkColorMaps;
-}
-
-declare module '@kitware/vtk.js/Widgets/Core/StateBuilder/boundsMixin' {
-  export declare function extend(publicAPI: any, model: any): void;
-}
-declare module '@kitware/vtk.js/Widgets/Core/StateBuilder/visibleMixin' {
-  export declare function extend(
-    publicAPI: any,
-    model: any,
-    initialValue: any
-  ): void;
-}
-declare module '@kitware/vtk.js/Widgets/Core/StateBuilder/scale1Mixin' {
-  export declare function extend(
-    publicAPI: any,
-    model: any,
-    initialValue: any
-  ): void;
-}
-
-declare module '@kitware/vtk.js/Widgets/Core/WidgetManager' {
-  import { vtkObject } from '@kitware/vtk.js/interfaces';
-  import vtkSelectionNode from '@kitware/vtk.js/Common/DataModel/SelectionNode';
-  import vtkRenderer from '@kitware/vtk.js/Rendering/Core/Renderer';
-  import vtkProp from '@kitware/vtk.js/Rendering/Core/Prop';
-  import vtkAbstractWidgetFactory from '@kitware/vtk.js/Widgets/Core/AbstractWidgetFactory';
-  import vtkAbstractWidget from '@kitware/vtk.js/Widgets/Core/AbstractWidget';
-  import vtkWidgetRepresentation from '@kitware/vtk.js/Widgets/Representations/WidgetRepresentation';
-
-  export enum RenderingTypes {
-    PICKING_BUFFER = 0,
-    FRONT_BUFFER = 1,
-  }
-
-  export enum CaptureOn {
-    MOUSE_MOVE = 0,
-    MOUSE_RELEASE = 1,
-  }
-
-  export enum ViewTypes {
-    DEFAULT = 0,
-    GEOMETRY = 1,
-    SLICE = 2,
-    VOLUME = 3,
-    YZ_PLANE = 4, // Sagittal
-    XZ_PLANE = 5, // Coronal
-    XY_PLANE = 6, // Axial
-  }
-
-  export interface SelectedData {
-    requestCount: number;
-    propID: number;
-    compositeID: number;
-    prop: vtkProp;
-    widget: vtkAbstractWidget;
-    representation: vtkWidgetRepresentation;
-    selectedState: vtkWidgetState;
-  }
-
-  export interface vtkWidgetManager extends vtkObject {
-    setCaptureOn(cap: CaptureOn): boolean;
-    getCaptureOn(): CaptureOn;
-    setViewType(type: ViewTypes): boolean;
-    getViewType(): ViewTypes;
-    getSelections(): vtkSelectionNode[];
-    getWidgets(): vtkAbstractWidget[];
-    getViewId(): string;
-    getPickingEnabled(): boolean;
-    /**
-     * @deprecated
-     */
-    getUseSvgLayer(): boolean;
-    /**
-     * @deprecated
-     */
-    setUseSvgLayer(use: boolean): boolean;
-
-    enablePicking(): void;
-    renderWidgets(): void;
-    disablePicking(): void;
-    setRenderer(ren: vtkRenderer): void;
-    addWidget(
-      widget: vtkAbstractWidgetFactory,
-      viewType?: ViewTypes,
-      initialValues?: object
-    ): vtkAbstractWidget | null;
-    removeWidgets(): void;
-    removeWidget(widget: vtkAbstractWidget | vtkAbstractWidgetFactory): void;
-    getSelectedDataForXY(x: number, y: number): Promise<SelectedData>;
-    updateSelectionFromXY(x: number, y: number): void;
-    updateSelectionFromMouseEvent(event: MouseEvent): void;
-    getSelectedData(): SelectedData | {};
-    grabFocus(widget: vtkAbstractWidget | vtkAbstractWidgetFactory): void;
-    releaseFocus(): void;
-  }
-
-  export interface IWidgetManagerInitialValues {
-    captureOn?: CaptureOn;
-    viewType?: ViewTypes;
-    pickingEnabled?: boolean;
-    /**
-     * @deprecated
-     */
-    useSvgLayer?: boolean;
-  }
-
-  export function extend(
-    publicAPI: object,
-    model: object,
-    initialValues?: IWidgetManagerInitialValues
-  ): vtkWidgetManager;
-
-  export function newInstance(
-    initialValues?: IWidgetManagerInitialValues
-  ): vtkWidgetManager;
-
-  export declare const vtkWidgetManager: {
-    newInstance: typeof newInstance;
-    extend: typeof extend;
-  };
-  export default vtkWidgetManager;
-}
-
-declare module '@kitware/vtk.js/Widgets/Core/StateBuilder' {
-  import vtkWidgetState from '@kitware/vtk.js/Widgets/Core/WidgetState';
-
-  export interface StateBuilder {
-    addDynamicMixinState(buildInfo: {
-      labels: string[];
-      mixins: string[];
-      name: string;
-      initialValues?: object;
-    }): StateBuilder;
-    addStateFromMixin(buildInfo: {
-      labels: string[];
-      mixins: string[];
-      name: string;
-      initialValues?: object;
-    }): StateBuilder;
-    addStateFromInstance(stateInfo: {
-      labels: string[];
-      name: string;
-      instance: vtkWidgetState;
-    });
-    addField(field: { name: string; initialValue: any });
-    build(...mixins: string[]): vtkWidgetState;
-  }
-
-  export function createBuilder(): StateBuilder;
-
-  export declare const vtkStateBuilder: {
-    createBuilder: typeof createBuilder;
-  };
-}
-
-declare module '@kitware/vtk.js/IO/XML/XMLImageDataWriter' {
-  export declare const vtkXMLImageDataWriter: {
-    newInstance: typeof newInstance;
-    extend: typeof extend;
-  };
-
-  export default vtkXMLImageDataWriter;
-}
-
-declare module '@kitware/vtk.js/Widgets/Widgets3D/ImageCroppingWidget' {
-  import vtkAbstractWidget from '@kitware/vtk.js/Widgets/Core/AbstractWidget';
-  import vtkAbstractWidgetFactory from '@kitware/vtk.js/Widgets/Core/AbstractWidgetFactory';
-  import vtkPlaneManipulator from '@kitware/vtk.js/Widgets/Manipulators/PlaneManipulator';
-  import vtkLineManipulator from '@kitware/vtk.js/Widgets/Manipulators/LineManipulator';
-  import { mat4, vec3 } from 'gl-matrix';
-  import vtkImageData from '@kitware/vtk.js/Common/DataModel/ImageData';
-  import vtkWidgetState from '@kitware/vtk.js/Widgets/Core/WidgetState';
-  import { Bounds } from '@kitware/vtk.js/types';
-
-  export interface ImageCroppingPlanesState extends vtkWidgetState {
-    getPlanes(): [number, number, number, number, number, number];
-    setPlanes(
-      planes: [number, number, number, number, number, number]
-    ): boolean;
-  }
-
-  export interface ImageCroppingWidgetState extends vtkWidgetState {
-    getIndexToWorldT(): mat4;
-    setIndexToWorldT(transform: mat4): boolean;
-    getWorldToIndexT(): mat4;
-    setWorldToIndexT(transform: mat4): boolean;
-    getCroppingPlanes(): ImageCroppingPlanesState;
-    placeWidget(bounds: Bounds): void;
-  }
-
-  export interface vtkImageCroppingViewWidget extends vtkAbstractWidget {
-    setManipulator(manipulator: vtkPlaneManipulator): boolean;
-    getManipulator(): vtkPlaneManipulator;
-  }
-
-  export interface vtkImageCroppingWidget extends vtkAbstractWidgetFactory {
-    getWidgetState(): ImageCroppingWidgetState;
-    getCornerManipulator(): vtkPlaneManipulator;
-    getEdgeManipulator(): vtkPlaneManipulator;
-    getFaceManipulator(): vtkLineManipulator;
-    setCornerManipulator(manip: vtkPlaneManipulator): boolean;
-    setEdgeManipulator(manip: vtkPlaneManipulator): boolean;
-    setFaceManipulator(manip: vtkLineManipulator): boolean;
-    copyImageDataDescription(image: vtkImageData);
-    setFaceHandlesEnabled(enabled: boolean): void;
-    setCornerHandlesEnabled(enabled: boolean): void;
-    setEdgeHandlesEnabled(enabled: boolean): void;
-  }
-
-  export function newInstance(): vtkImageCroppingWidget;
-
-  export declare const vtkImageCroppingWidget: {
-    newInstance: typeof newInstance;
-  };
-  export default vtkImageCroppingWidget;
-}
-
-declare module '@kitware/vtk.js/Widgets/Core/AbstractWidget/Constants' {
-  export declare const WIDGET_PRIORITY: number;
-}
-
-declare module '@kitware/vtk.js/Widgets/Widgets3D/ResliceCursorWidget' {
-  import vtkAbstractWidget from '@kitware/vtk.js/Widgets/Core/AbstractWidget';
-  import vtkWidgetState from '@kitware/vtk.js/Widgets/Core/WidgetState';
-  import type { Vector3, RGBColor } from '@kitware/vtk.js/types';
-  import vtkResliceCursorWidget from '@kitware/vtk.js/Widgets/Widgets3D/ResliceCursorWidget';
-
-  export interface vtkResliceCursorViewWidget extends vtkAbstractWidget {
-    setManipulator(manipulator: vtkPlaneManipulator): boolean;
-    getManipulator(): vtkPlaneManipulator;
-    setImage(image: vtkImageData): void;
-    setKeepOrthogonality(keepOrthogonality: boolean): void;
-    setScaleInPixels(scaleInPixels: boolean): void;
-    setCursorStyles(styles: {
-      translateCenter: string;
-      rotateLine: string;
-      translateAxis: string;
-    }): boolean;
-  }
-
-  export interface ResliceCursorWidgetState extends vtkWidgetState {
-    placeWidget(bounds: Bounds): void;
-    setColor3(color: RGBColor): boolean;
-    setScale1(scale: number): boolean;
-    setScale3(scaleX: number, scaleY: number, scaleZ: number): boolean;
-    getPlanes(): Record<number, { normal: Vector3; viewUp: Vector3 }>;
-    setPlanes(
-      planes: Record<number, { normal: Vector3; viewUp: Vector3 }>
-    ): void;
-    getCenter(): Vector3;
-    setScrollingMethod(mode: number): boolean;
-    setOpacity(opacity: number): boolean;
-    setImage(image: vtkImageData): boolean;
-    getImage(): vtkImageData;
-  }
-
-  // Just forwarding vtk-js's definition as default export:
-  export default vtkResliceCursorWidget;
-}
-
-declare module '@kitware/vtk.js/Interaction/Widgets/PiecewiseGaussianWidget' {
-  import type { Vector2 } from '@kitware/vtk.js/types';
-  import vtkPiecewiseFunction from '@kitware/vtk.js/Common/DataModel/PiecewiseFunction';
-
-  export interface vtkPiecewiseGaussianWidget {}
-
-  function applyGaussianToPiecewiseFunction(
-    gaussians: any,
-    sampling: number,
-    rangeToUse: Vector2,
-    piecewiseFunction: vtkPiecewiseFunction
-  ): void;
-
-  export declare const vtkPiecewiseGaussianWidget: {
-    applyGaussianToPiecewiseFunction: typeof applyGaussianToPiecewiseFunction;
-  };
-
-  export default vtkPiecewiseWidget;
-}
-
-declare module '@kitware/vtk.js/Filters/Core/Cutter' {
-  export type vtkCutter = any;
-  export declare const vtkCutter: any;
-  export default vtkCutter;
-}
-
-declare module '@kitware/vtk.js/Rendering/Core/AnnotatedCubeActor/Presets' {
-  export default {} as any;
-}
diff --git a/src/store/reslice-cursor.ts b/src/store/reslice-cursor.ts
index 8d92d8536..f471441e6 100644
--- a/src/store/reslice-cursor.ts
+++ b/src/store/reslice-cursor.ts
@@ -3,7 +3,7 @@ import { ImageMetadata } from '@/src/types/image';
 import { LPSAxis } from '@/src/types/lps';
 import { ViewTypes } from '@kitware/vtk.js/Widgets/Core/WidgetManager/Constants';
 import vtkResliceCursorWidget, {
-  ResliceCursorWidgetState,
+  vtkResliceCursorWidgetState,
 } from '@kitware/vtk.js/Widgets/Widgets3D/ResliceCursorWidget';
 import type { Vector3 } from '@kitware/vtk.js/types';
 import { defineStore } from 'pinia';
@@ -23,7 +23,7 @@ export function mapAxisToViewType(axis: LPSAxis) {
 }
 
 function resetReslicePlanes(
-  resliceCursorState: ResliceCursorWidgetState,
+  resliceCursorState: vtkResliceCursorWidgetState,
   imageMetadata: ImageMetadata
 ) {
   const { Inferior, Anterior, Superior, Left } = toRaw(
@@ -49,7 +49,7 @@ function resetReslicePlanes(
 
 function useResliceInit(
   resliceCursor: vtkResliceCursorWidget,
-  resliceCursorState: ResliceCursorWidgetState
+  resliceCursorState: vtkResliceCursorWidgetState
 ) {
   const { currentImageData, currentImageMetadata } = useCurrentImage('global');
 
@@ -69,7 +69,7 @@ const useResliceCursorStore = defineStore('resliceCursor', () => {
   }) as vtkResliceCursorWidget;
 
   const widgetState =
-    resliceCursor.getWidgetState() as ResliceCursorWidgetState;
+    resliceCursor.getWidgetState() as vtkResliceCursorWidgetState;
 
   useResliceInit(resliceCursor, widgetState);
 
diff --git a/src/types/color-map-preset.ts b/src/types/color-map-preset.ts
new file mode 100644
index 000000000..6bf7e15b5
--- /dev/null
+++ b/src/types/color-map-preset.ts
@@ -0,0 +1,26 @@
+import vtkColorMaps, {
+  IColorMapPreset,
+} from '@kitware/vtk.js/Rendering/Core/ColorTransferFunction/ColorMaps';
+
+/**
+ * A vtk.js color map preset carrying the extra opacity/range metadata VolView
+ * attaches to its own medical presets.
+ *
+ * vtk.js stores presets verbatim, so these fields survive a round trip through
+ * `addPreset`/`getPresetByName`; they are just not part of vtk.js's own type.
+ */
+export interface ColorMapPreset extends IColorMapPreset {
+  /** Flattened (x, opacity) pairs. */
+  OpacityPoints?: number[];
+  /** Whether RGBPoints are in absolute scalar units rather than normalized. */
+  AbsoluteRange?: boolean;
+  /** Preferred scalar opacity mapping range. */
+  EffectiveRange?: [number, number];
+}
+
+/**
+ * `vtkColorMaps.getPresetByName` narrowed to VolView's preset shape.
+ */
+export function getPresetByName(name: string): ColorMapPreset {
+  return vtkColorMaps.getPresetByName(name) as ColorMapPreset;
+}
diff --git a/src/utils/vtk-helpers.ts b/src/utils/vtk-helpers.ts
index f0841039a..82688e9d1 100644
--- a/src/utils/vtk-helpers.ts
+++ b/src/utils/vtk-helpers.ts
@@ -1,6 +1,6 @@
 import vtkPiecewiseFunctionProxy from '@kitware/vtk.js/Proxy/Core/PiecewiseFunctionProxy';
 import vtkPiecewiseFunction from '@kitware/vtk.js/Common/DataModel/PiecewiseFunction';
-import vtkColorMaps from '@kitware/vtk.js/Rendering/Core/ColorTransferFunction/ColorMaps';
+import { getPresetByName } from '@/src/types/color-map-preset';
 import vtkRenderer from '@kitware/vtk.js/Rendering/Core/Renderer';
 import vtkOpenGLRenderWindow from '@kitware/vtk.js/Rendering/OpenGL/RenderWindow';
 import type { Vector2, Vector3 } from '@kitware/vtk.js/types';
@@ -68,7 +68,7 @@ export function intersectMouseEventWithPlane(
   const position = normalizeMouseEventPosition(ev, view);
   if (!position) return null;
 
-  return intersectDisplayWithPlane(
+  const point = intersectDisplayWithPlane(
     position[0],
     position[1],
     origin,
@@ -76,6 +76,9 @@ export function intersectMouseEventWithPlane(
     renderer,
     view
   );
+  // vtkPlane.intersectWithLine yields an empty array when the line is parallel
+  // to the plane, so an empty result is a miss rather than a point at the origin.
+  return point.length === 3 ? point : null;
 }
 
 /**
@@ -127,7 +130,7 @@ export function getShiftedOpacityFromPreset(
   shift: number,
   shiftAlpha: number
 ) {
-  const preset = vtkColorMaps.getPresetByName(presetName);
+  const preset = getPresetByName(presetName);
   if (preset.OpacityPoints) {
     const opacityPoints = preset.OpacityPoints as number[];
     const points = [];
@@ -160,7 +163,7 @@ type OpacityFunctionWithoutRange =
 export function getOpacityFunctionFromPreset(
   presetName: string
 ): OpacityFunctionWithoutRange {
-  const preset = vtkColorMaps.getPresetByName(presetName);
+  const preset = getPresetByName(presetName);
 
   if (preset.OpacityPoints) {
     return {
@@ -203,7 +206,7 @@ export function inflateAxisBounds(bounds: number[], delta: number) {
 export function getColorFunctionRangeFromPreset(
   presetName: string
 ): [number, number] | null {
-  const preset = vtkColorMaps.getPresetByName(presetName);
+  const preset = getPresetByName(presetName);
   if (!preset) return null;
 
   const { AbsoluteRange, RGBPoints } = preset;
@@ -228,7 +231,7 @@ export function getColorFunctionRangeFromPreset(
  * @returns
  */
 export function getOpacityRangeFromPreset(presetName: string) {
-  const preset = vtkColorMaps.getPresetByName(presetName);
+  const preset = getPresetByName(presetName);
   if (preset.EffectiveRange) {
     return [...preset.EffectiveRange] as [number, number];
   }
diff --git a/src/vtk/ColorMaps.ts b/src/vtk/ColorMaps.ts
index 0a52d9995..5bb838b21 100644
--- a/src/vtk/ColorMaps.ts
+++ b/src/vtk/ColorMaps.ts
@@ -1,9 +1,10 @@
 import vtkColorMaps from '@kitware/vtk.js/Rendering/Core/ColorTransferFunction/ColorMaps';
+import { ColorMapPreset } from '@/src/types/color-map-preset';
 import MedicalPresets from '@/src/vtk/MedicalColorPresets.json';
 
 function registerPresets(presets: typeof MedicalPresets) {
   for (let i = 0; i < presets.length; i += 1) {
-    vtkColorMaps.addPreset(presets[i]);
+    vtkColorMaps.addPreset(presets[i] as ColorMapPreset);
   }
 }
 
@@ -14,7 +15,7 @@ const twoHotOpaque = {
   Name: '2hot-opaque',
   OpacityPoints: [0, 1],
 };
-vtkColorMaps.addPreset(twoHotOpaque);
+vtkColorMaps.addPreset(twoHotOpaque as ColorMapPreset);
 
 /* prettier-ignore */
 const GroupedPresets = [
diff --git a/src/vtk/CrosshairsWidget/index.d.ts b/src/vtk/CrosshairsWidget/index.d.ts
index 1954378ea..d992cb7e3 100644
--- a/src/vtk/CrosshairsWidget/index.d.ts
+++ b/src/vtk/CrosshairsWidget/index.d.ts
@@ -1,5 +1,5 @@
 import vtkAbstractWidget from '@kitware/vtk.js/Widgets/Core/AbstractWidget';
-import vtkAbstractWidgetFactory from '@kitware/vtk.js/Widgets/Core/AbstractWidgetFactory';
+import { vtkAbstractWidgetFactory } from '@kitware/vtk.js/Widgets/Core/AbstractWidgetFactory';
 import vtkPlaneManipulator from '@kitware/vtk.js/Widgets/Manipulators/PlaneManipulator';
 import { mat4, vec3 } from 'gl-matrix';
 import { CrosshairsWidgetState } from './state';
@@ -9,7 +9,7 @@ export interface vtkCrosshairsViewWidget extends vtkAbstractWidget {
   getManipulator(): vtkPlaneManipulator;
 }
 
-export interface vtkCrosshairsWidget extends vtkAbstractWidgetFactory {
+export interface vtkCrosshairsWidget extends vtkAbstractWidgetFactory<vtkCrosshairsViewWidget> {
   getWidgetState(): CrosshairsWidgetState;
   getManipulator(): vtkPlaneManipulator;
 }
diff --git a/src/vtk/PaintWidget/index.d.ts b/src/vtk/PaintWidget/index.d.ts
index a748ed822..55785f1c2 100644
--- a/src/vtk/PaintWidget/index.d.ts
+++ b/src/vtk/PaintWidget/index.d.ts
@@ -1,5 +1,5 @@
 import vtkAbstractWidget from '@kitware/vtk.js/Widgets/Core/AbstractWidget';
-import vtkAbstractWidgetFactory from '@kitware/vtk.js/Widgets/Core/AbstractWidgetFactory';
+import { vtkAbstractWidgetFactory } from '@kitware/vtk.js/Widgets/Core/AbstractWidgetFactory';
 import vtkPlaneManipulator from '@kitware/vtk.js/Widgets/Manipulators/PlaneManipulator';
 import { mat4, vec3 } from 'gl-matrix';
 import { PaintWidgetState } from './state';
@@ -14,7 +14,7 @@ export interface vtkPaintViewWidget extends vtkAbstractWidget {
   getWorldToIndex(): mat4;
 }
 
-export interface vtkPaintWidget extends vtkAbstractWidgetFactory {
+export interface vtkPaintWidget extends vtkAbstractWidgetFactory<vtkPaintViewWidget> {
   getWidgetState(): PaintWidgetState;
 }
 
diff --git a/src/vtk/PaintWidget/state.ts b/src/vtk/PaintWidget/state.ts
index b74dfeeb2..2ee254760 100644
--- a/src/vtk/PaintWidget/state.ts
+++ b/src/vtk/PaintWidget/state.ts
@@ -1,6 +1,8 @@
 import { IBrushStencil } from '@/src/core/tools/paint/brush';
 import type { Vector3 } from '@kitware/vtk.js/types';
-import vtkStateBuilder from '@kitware/vtk.js/Widgets/Core/StateBuilder';
+import vtkStateBuilder, {
+  vtkRootWidgetState,
+} from '@kitware/vtk.js/Widgets/Core/StateBuilder';
 import vtkWidgetState from '@kitware/vtk.js/Widgets/Core/WidgetState';
 
 export interface PaintPointWidgetState extends vtkWidgetState {
@@ -14,7 +16,7 @@ export interface PaintPointWidgetState extends vtkWidgetState {
   getColor(): number;
 }
 
-export interface PaintWidgetState extends vtkWidgetState {
+export interface PaintWidgetState extends vtkRootWidgetState {
   getBrush(): PaintPointWidgetState;
   getStencil(): IBrushStencil;
   setStencil(stencil: IBrushStencil): boolean;