diff --git a/src/components/ViewCube.tsx b/src/components/ViewCube.tsx
index 0e79926..ab44476 100644
--- a/src/components/ViewCube.tsx
+++ b/src/components/ViewCube.tsx
@@ -162,14 +162,18 @@ export function ViewCube() {
   const progress = isDone ? 1 : calibration.progress;
 
   const onClickCalibrar = () => {
+    const store = useModelStore.getState();
     if (isCalibrating) {
-      // Cancel mid-flow
+      // Cancel mid-flow — restore previous camera mode if we forced ortho.
+      const prev = (window as any).__tsxr_prevCamMode as 'ortho' | 'persp' | undefined;
+      if (prev) { store.setCameraMode(prev); (window as any).__tsxr_prevCamMode = undefined; }
       cancelCalibration();
       toast.info('Calibração cancelada');
       return;
     }
     if (isDone) {
-      // Reset/finish state
+      const prev = (window as any).__tsxr_prevCamMode as 'ortho' | 'persp' | undefined;
+      if (prev) { store.setCameraMode(prev); (window as any).__tsxr_prevCamMode = undefined; }
       cancelCalibration();
       return;
     }
@@ -181,8 +185,11 @@ export function ViewCube() {
       toast.error('Peça travada — destranque o cadeado para calibrar');
       return;
     }
+    // Force orthographic view for accurate face picking.
+    (window as any).__tsxr_prevCamMode = store.cameraMode;
+    if (store.cameraMode !== 'ortho') store.setCameraMode('ortho');
     startCalibration(active.id);
-    toast('Calibração iniciada — clique numa face do cubo, depois na face correspondente da peça', { duration: 4000 });
+    toast('Calibração em vista ortogonal — clique numa face do cubo, depois na face correspondente da peça', { duration: 4000 });
   };
 
   const onResetCalibration = () => {