diff --git a/src/pages/XRSession.tsx b/src/pages/XRSession.tsx
index 672120c..c68431e 100644
--- a/src/pages/XRSession.tsx
+++ b/src/pages/XRSession.tsx
@@ -1,7 +1,7 @@
 import { useEffect, useRef, useMemo, useCallback, useState } from 'react';
 import { useNavigate } from 'react-router-dom';
 import { Canvas, useFrame, useThree } from '@react-three/fiber';
-import { useGLTF, Grid, Html, Line } from '@react-three/drei';
+import { useGLTF, Grid, Html, Line, OrbitControls, Text } from '@react-three/drei';
 import { XR, createXRStore, useXR, XROrigin } from '@react-three/xr';
 import * as THREE from 'three';
 import { useModelStore } from '@/stores/useModelStore';
@@ -338,6 +338,59 @@ function XRGrid() {
 
 // ImageTrackingAnchor removed — replaced by XRHitTestPlacement
 
+// ─── XR Debug HUD (floats in front of viewer) ──────────
+// Shows live grip/trigger values and isGrabbing state per hand.
+// Essential for diagnosing grab issues without external monitoring.
+function XRDebugHud() {
+  const session = useXR((s) => s.session);
+  const groupRef = useRef<THREE.Group>(null);
+  const { camera } = useThree();
+  const [text, setText] = useState('XR aguardando inputs...');
+
+  useFrame(() => {
+    if (!groupRef.current) return;
+    // Anchor the HUD to a fixed offset in front of the camera
+    const offset = new THREE.Vector3(-0.25, -0.18, -0.6).applyQuaternion(camera.quaternion);
+    groupRef.current.position.copy(camera.position).add(offset);
+    groupRef.current.quaternion.copy(camera.quaternion);
+
+    if (!session) return;
+    const sources = Array.from(session.inputSources);
+    const lines: string[] = [`inputs: ${sources.length}`];
+    for (const src of sources) {
+      const gp = src.gamepad;
+      const grip = gp?.buttons[2];
+      const trig = gp?.buttons[1];
+      const gv = grip ? (grip.value || (grip.pressed ? 1 : 0)) : 0;
+      const tv = trig ? (trig.value || (trig.pressed ? 1 : 0)) : 0;
+      const grabbing = gv > 0.7 ? 'GRAB' : gv > 0.3 ? '...' : '   ';
+      lines.push(`${src.handedness.padEnd(5)} grip:${gv.toFixed(2)} trg:${tv.toFixed(2)} ${grabbing}`);
+    }
+    setText(lines.join('\n'));
+  });
+
+  return (
+    <group ref={groupRef}>
+      <mesh position={[0, 0, -0.001]}>
+        <planeGeometry args={[0.32, 0.10]} />
+        <meshBasicMaterial color="#000000" transparent opacity={0.55} depthWrite={false} />
+      </mesh>
+      <Text
+        fontSize={0.012}
+        color="#22c55e"
+        anchorX="left"
+        anchorY="top"
+        position={[-0.155, 0.045, 0]}
+        maxWidth={0.30}
+        lineHeight={1.25}
+      >
+        {text}
+      </Text>
+    </group>
+  );
+}
+
+
 // ─── XRSession Page ────────────────────────────────────
 const XRSession = () => {
   const navigate = useNavigate();
@@ -422,7 +475,7 @@ const XRSession = () => {
       <div className="flex-1 relative">
         <Canvas
           gl={{ antialias: true, alpha: true, powerPreference: 'high-performance', preserveDrawingBuffer: true }}
-          camera={{ position: [0, 1.6, 0], fov: 50, near: 0.01, far: 100 }}
+          camera={{ position: [1.5, 1.2, 1.5], fov: 50, near: 0.01, far: 100 }}
           className="!bg-transparent"
           onCreated={({ gl, invalidate }) => {
             gl.setPixelRatio(Math.min(window.devicePixelRatio, 1.5));
@@ -438,28 +491,51 @@ const XRSession = () => {
 
             <XROrigin />
 
-            <XRHitTestPlacement
-              placementMode={placementMode}
-              snapToPlanes={snapToPlanes}
-              onPlace={() => {
-                setPlacementMode(false);
-                toast.success('Modelo posicionado na superfície!');
-              }}
-            >
-              <XRGrabbable
-                allowScale={allowScale}
-                onGrabStart={() => {
-                  if (placementMode) setPlacementMode(false);
-                }}
-              >
-                <XRModel url={model.url} />
-              </XRGrabbable>
-            </XRHitTestPlacement>
+            {inXR ? (
+              <>
+                {/* In XR: hit-test placement → grab wrapper → model */}
+                <XRHitTestPlacement
+                  placementMode={placementMode}
+                  snapToPlanes={snapToPlanes}
+                  onPlace={() => {
+                    setPlacementMode(false);
+                    toast.success('Modelo posicionado na superfície!');
+                  }}
+                >
+                  <XRGrabbable
+                    allowScale={allowScale}
+                    onGrabStart={() => {
+                      if (placementMode) setPlacementMode(false);
+                    }}
+                  >
+                    <XRModel url={model.url} />
+                  </XRGrabbable>
+                </XRHitTestPlacement>
+
+                <XRMeasurementOverlay />
+                <ControllerFineTuning freeMove={freeMove} />
+                <XRDebugHud />
+              </>
+            ) : (
+              <>
+                {/* Desktop preview (no headset): show model with OrbitControls */}
+                <group position={[0, 0, 0]}>
+                  <XRModel url={model.url} />
+                </group>
+                <XRMeasurementOverlay />
+                <OrbitControls
+                  makeDefault
+                  enableDamping
+                  dampingFactor={0.1}
+                  minDistance={0.05}
+                  maxDistance={50}
+                  target={[0, 0, 0]}
+                />
+              </>
+            )}
 
-            <XRMeasurementOverlay />
             <XRSnapHandler />
             <XRGrid />
-            <ControllerFineTuning freeMove={freeMove} />
           </XR>
         </Canvas>