diff --git a/src/components/ViewerControls.tsx b/src/components/ViewerControls.tsx
index 07563c0..80d9c32 100644
--- a/src/components/ViewerControls.tsx
+++ b/src/components/ViewerControls.tsx
@@ -1,4 +1,4 @@
-import { Eye, Grid3X3, Ruler, Trash2, Camera, LayoutGrid, Palette, Box, Move3D, Undo2, MousePointerClick, EyeOff, Focus, Download } from 'lucide-react';
+import { Eye, Grid3X3, Ruler, Trash2, Camera, LayoutGrid, Palette, Box, Move3D, Undo2, MousePointerClick, EyeOff, Focus, Download, Footprints, Compass, Map } from 'lucide-react';
 import { Slider } from '@/components/ui/slider';
 import { Button } from '@/components/ui/button';
 import { Popover, PopoverContent, PopoverTrigger } from '@/components/ui/popover';
@@ -44,6 +44,9 @@ export function ViewerControls() {
     selectionMode, setSelectionMode,
     selectedElementKeys, hiddenElementKeys, isolatedElementKeys,
     hideSelectedElements, isolateSelectedElements, showAllElements, clearElementSelection,
+    desktopCameraMode, setDesktopCameraMode,
+    xrEnvironment, setXrEnvironment,
+    xrScaleMode, setXrScaleMode,
   } = useModelStore();
   const activeModel = models.find(m => m.id === activeModelId);
   const hasSelection = selectedElementKeys.size > 0;
@@ -290,6 +293,74 @@ export function ViewerControls() {
         )}
       </div>
 
+      {/* Seletor de Câmera (Orbit vs Walk) */}
+      <Button
+        variant={desktopCameraMode === 'walk' ? 'default' : 'outline'}
+        size="sm"
+        className="gap-2 h-9"
+        onClick={() => {
+          const next = desktopCameraMode === 'orbit' ? 'walk' : 'orbit';
+          setDesktopCameraMode(next);
+          if (next === 'walk') {
+            toast.info("Passeio 3D Ativo: clique no visualizador para prender o mouse. WASD = andar, Q/E = subir/descer, ESC = soltar mouse.");
+          }
+        }}
+        title="Alternar entre câmera orbital e passeio em primeira pessoa"
+      >
+        {desktopCameraMode === 'walk' ? <Footprints className="h-3.5 w-3.5" /> : <Compass className="h-3.5 w-3.5" />}
+        <span className="font-mono text-xs">
+          {desktopCameraMode === 'walk' ? 'Passeio 3D' : 'Câmera'}
+        </span>
+      </Button>
+
+      {/* Seletor de Cenário 2D */}
+      <Popover>
+        <PopoverTrigger asChild>
+          <Button variant="outline" size="sm" className="gap-2 h-9" title="Alterar cenário de fundo do visualizador">
+            <Map className="h-3.5 w-3.5" />
+            <span className="font-mono text-xs">
+              {xrEnvironment === 'passthrough' ? 'Estúdio' : xrEnvironment === 'office' ? 'Escritório' : 'Campo Aberto'}
+            </span>
+          </Button>
+        </PopoverTrigger>
+        <PopoverContent className="w-56 space-y-2" side="top" align="start">
+          <div className="flex flex-col gap-1.5">
+            <span className="font-mono text-[10px] font-semibold text-muted-foreground uppercase tracking-wider mb-1">
+              Cenário de Fundo
+            </span>
+            <Button
+              variant={xrEnvironment === 'passthrough' ? 'default' : 'ghost'}
+              size="sm"
+              className="justify-start font-mono text-xs h-8"
+              onClick={() => setXrEnvironment('passthrough')}
+            >
+              🌌 Estúdio (Padrão)
+            </Button>
+            <Button
+              variant={xrEnvironment === 'office' ? 'default' : 'ghost'}
+              size="sm"
+              className="justify-start font-mono text-xs h-8"
+              onClick={() => {
+                setXrEnvironment('office');
+                setXrScaleMode('tabletop');
+              }}
+            >
+              🏢 Escritório (VR Mesa)
+            </Button>
+            <Button
+              variant={xrEnvironment === 'field' ? 'default' : 'ghost'}
+              size="sm"
+              className="justify-start font-mono text-xs h-8"
+              onClick={() => {
+                setXrEnvironment('field');
+                setXrScaleMode('realscale');
+              }}
+            >
+              🌳 Campo Aberto (VR Grama)
+            </Button>
+          </div>
+        </PopoverContent>
+      </Popover>
 
       {/* Screenshot */}
       <Button
diff --git a/src/components/three/DesktopFirstPersonControls.tsx b/src/components/three/DesktopFirstPersonControls.tsx
new file mode 100644
index 0000000..ea15f3f
--- /dev/null
+++ b/src/components/three/DesktopFirstPersonControls.tsx
@@ -0,0 +1,154 @@
+import { useEffect, useRef } from 'react';
+import { useFrame, useThree } from '@react-three/fiber';
+import { PointerLockControls } from '@react-three/drei';
+import * as THREE from 'three';
+import { useModelStore } from '@/stores/useModelStore';
+
+export function DesktopFirstPersonControls() {
+  const { camera } = useThree();
+  const activeMode = useModelStore((s) => s.desktopCameraMode);
+  const xrEnvironment = useModelStore((s) => s.xrEnvironment);
+
+  // Armazena o estado atual das teclas de locomoção
+  const keys = useRef({
+    w: false,
+    a: false,
+    s: false,
+    d: false,
+    arrowup: false,
+    arrowleft: false,
+    arrowdown: false,
+    arrowright: false,
+    q: false, // voar para baixo
+    e: false, // voar para cima
+  });
+
+  useEffect(() => {
+    if (activeMode !== 'walk') return;
+
+    const handleKeyDown = (e: KeyboardEvent) => {
+      const k = e.key.toLowerCase();
+      if (k in keys.current) {
+        keys.current[k as keyof typeof keys.current] = true;
+      }
+    };
+
+    const handleKeyUp = (e: KeyboardEvent) => {
+      const k = e.key.toLowerCase();
+      if (k in keys.current) {
+        keys.current[k as keyof typeof keys.current] = false;
+      }
+    };
+
+    window.addEventListener('keydown', handleKeyDown);
+    window.addEventListener('keyup', handleKeyUp);
+    
+    return () => {
+      window.removeEventListener('keydown', handleKeyDown);
+      window.removeEventListener('keyup', handleKeyUp);
+    };
+  }, [activeMode]);
+
+  // Define posições iniciais amigáveis ao alternar para o modo passeio
+  const lastMode = useRef<string | null>(null);
+  useEffect(() => {
+    if (activeMode === 'walk' && lastMode.current !== 'walk') {
+      if (xrEnvironment === 'office') {
+        // Posiciona o operador em pé na ponta da mesa
+        camera.position.set(0, 1.4, 1.3);
+        camera.lookAt(0, 0.85, 0);
+      } else {
+        // Posiciona no campo aberto em escala real
+        camera.position.set(0, 1.65, 3);
+        camera.lookAt(0, 1.0, 0);
+      }
+    }
+    lastMode.current = activeMode;
+  }, [activeMode, xrEnvironment, camera]);
+
+  useFrame((state, delta) => {
+    if (activeMode !== 'walk') return;
+
+    const speed = 2.0 * delta; // Metros por frame adaptativo
+    const rotSpeed = 1.5 * delta;
+
+    const direction = new THREE.Vector3();
+    const side = new THREE.Vector3();
+
+    // Obtém vetor de olhar da câmera
+    camera.getWorldDirection(direction);
+    direction.y = 0; // Trava o vetor na horizontal para não voar para cima/baixo ao olhar
+    direction.normalize();
+
+    // Obtém vetor lateral
+    side.crossVectors(camera.up, direction).normalize();
+
+    // 1. Leituras do teclado
+    let moveFwd = 0;
+    let moveSide = 0;
+    let moveUp = 0;
+
+    if (keys.current.w || keys.current.arrowup) moveFwd += 1;
+    if (keys.current.s || keys.current.arrowdown) moveFwd -= 1;
+    if (keys.current.d || keys.current.arrowright) moveSide -= 1;
+    if (keys.current.a || keys.current.arrowleft) moveSide += 1;
+    if (keys.current.e) moveUp += 1;
+    if (keys.current.q) moveUp -= 1;
+
+    camera.position.addScaledVector(direction, moveFwd * speed);
+    camera.position.addScaledVector(side, moveSide * speed);
+    camera.position.y += moveUp * speed;
+
+    // 2. Leituras da Gamepad API (Xbox / PlayStation)
+    const gamepads = navigator.getGamepads();
+    const gp = gamepads[0] || gamepads[1];
+    if (gp) {
+      const deadzone = 0.15;
+
+      // Analógico Esquerdo (Locomoção)
+      const stickLX = gp.axes[0]; // Eixo lateral
+      const stickLY = gp.axes[1]; // Eixo frente/trás
+
+      if (Math.abs(stickLY) > deadzone) {
+        camera.position.addScaledVector(direction, -stickLY * speed);
+      }
+      if (Math.abs(stickLX) > deadzone) {
+        camera.position.addScaledVector(side, -stickLX * speed);
+      }
+
+      // Analógico Direito (Rotação da Câmera)
+      const stickRX = gp.axes[2]; // Rotação Y
+      const stickRY = gp.axes[3]; // Olhar X cima/baixo
+
+      if (Math.abs(stickRX) > deadzone) {
+        camera.rotation.y -= stickRX * rotSpeed * 1.6;
+      }
+      if (Math.abs(stickRY) > deadzone) {
+        // Rotaciona verticalmente
+        camera.rotation.x -= stickRY * rotSpeed * 1.6;
+        // Limita ângulo vertical para evitar inverter a visão (entre -80° e 80°)
+        camera.rotation.x = Math.max(-1.4, Math.min(1.4, camera.rotation.x));
+      }
+
+      // Gatilhos para controle de altura (RT sobe, LT desce)
+      const triggerLT = gp.buttons[6];
+      const triggerRT = gp.buttons[7];
+      if (triggerRT && triggerRT.value > 0.1) {
+        camera.position.y += triggerRT.value * speed;
+      }
+      if (triggerLT && triggerLT.value > 0.1) {
+        camera.position.y -= triggerLT.value * speed;
+      }
+    }
+
+    // Trava de colisão com o chão/mesa para manter realismo
+    const minHeight = xrEnvironment === 'office' ? 0.9 : 0.1;
+    if (camera.position.y < minHeight) {
+      camera.position.y = minHeight;
+    }
+  });
+
+  if (activeMode !== 'walk') return null;
+
+  return <PointerLockControls makeDefault />;
+}
diff --git a/src/components/three/ModelViewer.tsx b/src/components/three/ModelViewer.tsx
index f4edd9d..e3a3437 100644
--- a/src/components/three/ModelViewer.tsx
+++ b/src/components/three/ModelViewer.tsx
@@ -23,6 +23,7 @@ import {
   XREnvironmentSelector,
 } from './XRSceneComponents';
 import { XRGrabbable } from './XRGrabbable';
+import { DesktopFirstPersonControls } from './DesktopFirstPersonControls';
 import { XRHitTestPlacement } from './XRHitTestPlacement';
 import { XRControllerMeasure } from './XRControllerMeasure';
 import { ControllerLocomotion } from './ControllerLocomotion';
@@ -1205,6 +1206,7 @@ function SceneInsideXR({
   const activeModel = models.find(m => m.id === activeId);
   const isActiveLocked = !!activeModel?.locked;
   const xrEnvironment = useModelStore((s) => s.xrEnvironment);
+  const desktopCameraMode = useModelStore((s) => s.desktopCameraMode);
 
   const rigRef = useRef<THREE.Group>(null);
   const devkit = useDevKit();
@@ -1225,9 +1227,15 @@ function SceneInsideXR({
     // Modo 2D normal (não imersivo)
     return (
       <>
-        <ambientLight intensity={0.6} />
-        <directionalLight position={[5, 10, 5]} intensity={1} castShadow />
-        <directionalLight position={[-5, 5, -5]} intensity={0.3} />
+        {xrEnvironment === 'passthrough' && (
+          <>
+            <ambientLight intensity={0.6} />
+            <directionalLight position={[5, 10, 5]} intensity={1} castShadow />
+            <directionalLight position={[-5, 5, -5]} intensity={0.3} />
+          </>
+        )}
+
+        <XREnvironmentSelector />
 
         <Suspense fallback={<LoadingFallback />}>
           <SceneModels />
@@ -1246,14 +1254,18 @@ function SceneInsideXR({
         <VisibilityApplier />
         <SceneRefCapture />
 
-        <OrbitControls
-          makeDefault
-          enableDamping
-          dampingFactor={0.1}
-          minDistance={0.05}
-          maxDistance={50}
-          enabled={!positionMode}
-        />
+        {desktopCameraMode === 'orbit' ? (
+          <OrbitControls
+            makeDefault
+            enableDamping
+            dampingFactor={0.1}
+            minDistance={0.05}
+            maxDistance={50}
+            enabled={!positionMode}
+          />
+        ) : (
+          <DesktopFirstPersonControls />
+        )}
       </>
     );
   }
diff --git a/src/stores/useModelStore.ts b/src/stores/useModelStore.ts
index 6ca1312..437a677 100644
--- a/src/stores/useModelStore.ts
+++ b/src/stores/useModelStore.ts
@@ -311,6 +311,8 @@ interface ModelStore {
   setXrEnvironment: (env: 'passthrough' | 'office' | 'field') => void;
   xrScaleMode: 'tabletop' | 'realscale';
   setXrScaleMode: (mode: 'tabletop' | 'realscale') => void;
+  desktopCameraMode: 'orbit' | 'walk';
+  setDesktopCameraMode: (mode: 'orbit' | 'walk') => void;
 }
 
 /** Sync top-level legacy `model` / `fineTuning` from active SceneModel. */
@@ -695,4 +697,6 @@ export const useModelStore = create<ModelStore>((set, get) => ({
   setXrEnvironment: (env) => set({ xrEnvironment: env }),
   xrScaleMode: 'realscale',
   setXrScaleMode: (mode) => set({ xrScaleMode: mode }),
+  desktopCameraMode: 'orbit',
+  setDesktopCameraMode: (mode) => set({ desktopCameraMode: mode }),
 }));