diff --git a/src/pages/people/relationships/components/RelationshipGalaxyThreeCanvas.vue b/src/pages/people/relationships/components/RelationshipGalaxyThreeCanvas.vue
index 98fffbed..e8fcf075 100644
--- a/src/pages/people/relationships/components/RelationshipGalaxyThreeCanvas.vue
+++ b/src/pages/people/relationships/components/RelationshipGalaxyThreeCanvas.vue
@@ -68,7 +68,9 @@ const emit = defineEmits<{
 const canvasRoot = ref<HTMLElement | null>(null)
 const labels = shallowRef<VisibleLabel[]>([])
 const hoveredKey = ref<string | null>(null)
-const sceneModel = shallowRef<RelationshipGalaxy3DScene>(buildRelationshipGalaxy3DScene(props.graph))
+const sceneModel = shallowRef<RelationshipGalaxy3DScene>(
+  buildRelationshipGalaxy3DScene(props.graph, { selectedKey: props.selectedKey })
+)
 const selectedVisibleLabelKeys = shallowRef<Set<string> | null>(null)
 
 let renderer: THREE.WebGLRenderer | null = null
@@ -117,7 +119,7 @@ function scenePosition(node: RelationshipGalaxy3DNode, model: RelationshipGalaxy
 function renderGraph(shouldFit = false) {
   if (!scene || !camera || !renderer) return
 
-  const model = buildRelationshipGalaxy3DScene(props.graph)
+  const model = buildRelationshipGalaxy3DScene(props.graph, { selectedKey: props.selectedKey })
   sceneModel.value = model
   updateSelectedVisibleLabelKeys()
   clearGroup(edgeGroup)
@@ -778,9 +780,7 @@ watch(
 watch(
   () => props.selectedKey,
   () => {
-    updateSelectedVisibleLabelKeys()
-    labelFrame = 1
-    updateLabels()
+    renderGraph(false)
   },
   { flush: 'post' }
 )
diff --git a/src/pages/people/relationships/relationship-galaxy-3d-canvas-source.test.ts b/src/pages/people/relationships/relationship-galaxy-3d-canvas-source.test.ts
new file mode 100644
index 00000000..c06a2eb4
--- /dev/null
+++ b/src/pages/people/relationships/relationship-galaxy-3d-canvas-source.test.ts
@@ -0,0 +1,47 @@
+/**
+ * Run: pnpm test -- src/pages/people/relationships/relationship-galaxy-3d-canvas-source.test.ts
+ */
+
+import assert from 'node:assert/strict'
+import { readFileSync } from 'node:fs'
+import { describe, it } from 'node:test'
+
+function readCanvasSource(): string {
+  return readFileSync(new URL('./components/RelationshipGalaxyThreeCanvas.vue', import.meta.url), 'utf8')
+}
+
+describe('RelationshipGalaxyThreeCanvas scene wiring', () => {
+  it('passes the selected node into 3D scene construction', () => {
+    const source = readCanvasSource()
+    const initialSceneModel = source.slice(
+      source.indexOf('const sceneModel'),
+      source.indexOf('const selectedVisibleLabelKeys')
+    )
+    const renderGraph = source.slice(
+      source.indexOf('function renderGraph'),
+      source.indexOf('function updateSelectedVisibleLabelKeys')
+    )
+
+    assert.ok(
+      initialSceneModel.includes('buildRelationshipGalaxy3DScene(props.graph, { selectedKey: props.selectedKey })'),
+      'initial 3D scene must respect selectedKey when the canvas is mounted with an active selection'
+    )
+    assert.ok(
+      renderGraph.includes('buildRelationshipGalaxy3DScene(props.graph, { selectedKey: props.selectedKey })'),
+      '3D canvas must rebuild scene topology with selectedKey so focused neighborhoods are centered and filtered'
+    )
+  })
+
+  it('rebuilds the 3D scene when selectedKey changes', () => {
+    const source = readCanvasSource()
+    const selectedKeyWatcher = source.slice(
+      source.indexOf('watch(\n  () => props.selectedKey'),
+      source.indexOf('watch(\n  () => props.privacyMode')
+    )
+
+    assert.ok(
+      selectedKeyWatcher.includes('renderGraph(false)'),
+      'selectedKey changes affect 3D topology and must not be handled as a label-only update'
+    )
+  })
+})