diff --git a/src/components/ai-edition/RightPanes.layout.test.tsx b/src/components/ai-edition/RightPanes.layout.test.tsx
new file mode 100644
index 000000000..d55f5cec6
--- /dev/null
+++ b/src/components/ai-edition/RightPanes.layout.test.tsx
@@ -0,0 +1,98 @@
+// @vitest-environment jsdom
+import "@testing-library/jest-dom";
+import { cleanup, render, screen, within } from "@testing-library/react";
+import { afterEach, describe, expect, it } from "vitest";
+import { I18nProvider } from "@/contexts/I18nContext";
+import { type AxcutDocument, createEmptyDocument } from "@/lib/ai-edition/schema";
+import { useProjectStore } from "@/lib/ai-edition/store/projectStore";
+import { LayoutPane } from "./RightPanes";
+
+function seedProject(hasCamera: boolean): AxcutDocument {
+	const base = createEmptyDocument({ projectId: "project_layout", title: "Layout" });
+	return {
+		...base,
+		assets: [
+			{
+				id: "asset_1",
+				kind: "video",
+				label: "screen.webm",
+				originalPath: "/tmp/screen.webm",
+				durationSec: 10,
+				video: { codec: "unknown", width: 1920, height: 1080, fps: 30 },
+				cameraTrack: hasCamera
+					? { sourcePath: "/tmp/camera.webm", startMs: 0, offsetMs: 0, visible: true }
+					: null,
+			},
+		],
+		project: { ...base.project, primaryAssetId: "asset_1" },
+		timeline: {
+			...base.timeline,
+			clips: [
+				{
+					id: "clip_1",
+					assetId: "asset_1",
+					sourceStartSec: 0,
+					sourceEndSec: 10,
+					timelineStartSec: 0,
+					timelineEndSec: 10,
+					wordRefs: [],
+					origin: "user",
+					reason: "test",
+				},
+			],
+		},
+		legacyEditor: { webcamLayoutPreset: "picture-in-picture" },
+	};
+}
+
+function renderLayout(document: AxcutDocument) {
+	useProjectStore.setState({
+		projectId: document.project.id,
+		document,
+		revision: 1,
+		status: "ready",
+	});
+	return render(
+		<I18nProvider>
+			<LayoutPane />
+		</I18nProvider>,
+	);
+}
+
+afterEach(() => {
+	cleanup();
+	useProjectStore.getState().clear();
+});
+
+describe("LayoutPane camera availability", () => {
+	it("shows No webcam without overwriting the saved camera preset", () => {
+		const document = seedProject(false);
+		renderLayout(document);
+
+		const preset = screen.getByRole("combobox");
+		expect(preset).toBeDisabled();
+		expect(preset).toHaveValue("no-webcam");
+		expect(useProjectStore.getState().document?.legacyEditor).toMatchObject({
+			webcamLayoutPreset: "picture-in-picture",
+		});
+		expect(screen.queryByText("Camera Shape")).not.toBeInTheDocument();
+		expect(screen.queryByText("Shrink on Zoom")).not.toBeInTheDocument();
+		expect(screen.queryByText("Webcam Size")).not.toBeInTheDocument();
+		const mirrorRow = screen.getByText("Mirror Webcam").closest("div");
+		expect(mirrorRow).not.toBeNull();
+		expect(within(mirrorRow as HTMLElement).getByRole("button")).toBeDisabled();
+	});
+
+	it("keeps the saved preset active when a timeline clip has a camera", () => {
+		renderLayout(seedProject(true));
+
+		const preset = screen.getByRole("combobox");
+		expect(preset).toBeEnabled();
+		expect(preset).toHaveValue("picture-in-picture");
+		expect(screen.getByText("Camera Shape")).toBeInTheDocument();
+		expect(screen.getByText("Shrink on Zoom")).toBeInTheDocument();
+		expect(screen.getByText("Webcam Size")).toBeInTheDocument();
+		expect(screen.getByRole("button", { name: "Rounded" })).toBeEnabled();
+		expect(screen.getByRole("slider")).toBeEnabled();
+	});
+});
diff --git a/src/components/ai-edition/RightPanes.tsx b/src/components/ai-edition/RightPanes.tsx
index 5ac70471a..f86c78e4d 100644
--- a/src/components/ai-edition/RightPanes.tsx
+++ b/src/components/ai-edition/RightPanes.tsx
@@ -1500,25 +1500,26 @@ export function LayoutPane() {
 	const ts = useScopedT("settings");
 	const { settings, set, setLive, commit, hasDocument } = useEditorSettings();
 	const document = useProjectStore((s) => s.document);
+	// A project can hold clips with no camera attached at all (plain imports or
+	// a recording made without a webcam). Keep the saved camera preference for
+	// later, but make the disabled control describe what the preview/export
+	// actually render right now.
+	const hasAnyCamera = document
+		? hasAnyClipWithCamera(document.assets, document.timeline.clips)
+		: false;
+	const effectiveLayoutPreset = hasAnyCamera ? settings.webcamLayoutPreset : "no-webcam";
 
 	// Synchro initiale : cf. NativeCompositorOverlay (`pushAllNativeParams`).
 	// the mask shape picker only makes sense for Picture-in-Picture.
 	// Dual-frame (side-by-side) and vertical-stack (top/bottom) weld the camera
 	// to the screen as one block — the mask is rectangular and sized off the
 	// screen capture — so we hide those controls when the preset isn't PiP.
-	const isPip = settings.webcamLayoutPreset === "picture-in-picture";
+	const isPip = effectiveLayoutPreset === "picture-in-picture";
 	// Same reason for "Shrink on zoom": shrinking the camera mid-zoom would tear a
 	// hole in the block, so the block layouts force it off (see
 	// `supportsWebcamReactiveZoom`) and the toggle is dropped rather than shown
 	// as a control that does nothing.
-	const supportsReactiveZoom = supportsWebcamReactiveZoom(settings.webcamLayoutPreset);
-	// P4 — a project can hold clips with no camera attached at all (plain
-	// imported videos, or a recording made without a webcam). The layout
-	// controls have nothing to act on in that case, so they're disabled
-	// rather than left live for a preset that will never show anything.
-	const hasAnyCamera = document
-		? hasAnyClipWithCamera(document.assets, document.timeline.clips)
-		: false;
+	const supportsReactiveZoom = supportsWebcamReactiveZoom(effectiveLayoutPreset);
 	const layoutControlsDisabled = !hasDocument || !hasAnyCamera;
 	return (
 		<Pane title={ts("layout.title")} icon={<LayoutIcon size={14} />} helpText={ts("layout.help")}>
@@ -1526,7 +1527,7 @@ export function LayoutPane() {
 			<div className={styles.field}>
 				<label>{ts("layout.title")}</label>
 				<select
-					value={settings.webcamLayoutPreset}
+					value={effectiveLayoutPreset}
 					disabled={layoutControlsDisabled}
 					onChange={(e) =>
 						void set({ webcamLayoutPreset: e.target.value as typeof settings.webcamLayoutPreset })