diff --git a/src/components/ViewerControls.tsx b/src/components/ViewerControls.tsx
index 1fdff3b..8fddf5d 100644
--- a/src/components/ViewerControls.tsx
+++ b/src/components/ViewerControls.tsx
@@ -276,11 +276,11 @@ export function ViewerControls() {
         className="gap-2 h-9"
         onClick={() => {
           if (!walkMode) {
-            toast.info("Modo Caminhada: Use WASD para se mover e o mouse para olhar ao redor. Pressione ESC para sair.");
+            toast.info("Modo Caminhada: Use WASD para andar, Q/E para subir/descer e o mouse para olhar. ESC para sair.");
           }
           setWalkMode(!walkMode);
         }}
-        title="Modo primeira pessoa (WASD para andar)"
+        title="Modo primeira pessoa (WASD mover, Q/E subir/descer)"
       >
         <Footprints className="h-3.5 w-3.5" />
         <span className="font-mono text-xs">
diff --git a/src/components/three/ModelViewer.tsx b/src/components/three/ModelViewer.tsx
index 575c701..ca3b726 100644
--- a/src/components/three/ModelViewer.tsx
+++ b/src/components/three/ModelViewer.tsx
@@ -1337,7 +1337,7 @@ function WalkControls() {
   const { camera } = useThree();
   // eslint-disable-next-line @typescript-eslint/no-explicit-any
   const controlsRef = useRef<any>(null);
-  const keys = useRef({ w: false, a: false, s: false, d: false, shift: false });
+  const keys = useRef({ w: false, a: false, s: false, d: false, q: false, e: false, shift: false });
   const initialized = useRef(false);
 
   useEffect(() => {
@@ -1367,6 +1367,8 @@ function WalkControls() {
       if (e.code === 'KeyA') keys.current.a = true;
       if (e.code === 'KeyS') keys.current.s = true;
       if (e.code === 'KeyD') keys.current.d = true;
+      if (e.code === 'KeyQ') keys.current.q = true;
+      if (e.code === 'KeyE') keys.current.e = true;
       if (e.code === 'ShiftLeft' || e.code === 'ShiftRight') keys.current.shift = true;
     };
     const onKeyUp = (e: KeyboardEvent) => {
@@ -1374,6 +1376,8 @@ function WalkControls() {
       if (e.code === 'KeyA') keys.current.a = false;
       if (e.code === 'KeyS') keys.current.s = false;
       if (e.code === 'KeyD') keys.current.d = false;
+      if (e.code === 'KeyQ') keys.current.q = false;
+      if (e.code === 'KeyE') keys.current.e = false;
       if (e.code === 'ShiftLeft' || e.code === 'ShiftRight') keys.current.shift = false;
     };
     window.addEventListener('keydown', onKeyDown);
@@ -1408,8 +1412,15 @@ function WalkControls() {
       dir.normalize();
       camera.position.addScaledVector(dir, speed * dt);
     }
-    // Always stick to exactly 1.7m above ground
-    camera.position.y = gridY + 1.7;
+    
+    // Vertical movement (Q / E)
+    if (keys.current.e) camera.position.y += speed * dt;
+    if (keys.current.q) camera.position.y -= speed * dt;
+
+    // Clamp to prevent clipping through the ground
+    if (camera.position.y < gridY + 0.2) {
+      camera.position.y = gridY + 0.2;
+    }
   });
 
   if (!walkMode) return null;