diff --git a/src/index.html b/src/index.html
index 1926a48..a26da8d 100644
--- a/src/index.html
+++ b/src/index.html
@@ -23,7 +23,7 @@
             <p>✌️ Two finger drag: Pan around scene</p>
             <hr style="margin: 10px 0; border: 1px solid #555;">
             <p>🚶 <button id="fpv-btn" style="background: #2196F3; color: white; border: none; padding: 8px 12px; border-radius: 4px; cursor: pointer; font-size: 12px; margin-right: 10px;">Enter FPV Mode</button> <span style="font-size: 11px; color: #aaa;">(or press F key to toggle)</span></p>
-            <p style="font-size: 11px; color: #aaa; margin: 5px 0;">In FPV: WASD to move, mouse to look, F or ESC to exit</p>
+            <p style="font-size: 11px; color: #aaa; margin: 5px 0;">In FPV: WASD to move, mouse to look, SPACE to jump, SHIFT to crouch, F or ESC to exit</p>
             <button id="print-btn" style="background: #4CAF50; color: white; border: none; padding: 8px 12px; border-radius: 4px; cursor: pointer; font-size: 12px;">🖨️ Print</button>
         </div>
     </div>
diff --git a/src/index.js b/src/index.js
index efdb191..df57e26 100644
--- a/src/index.js
+++ b/src/index.js
@@ -16,10 +16,15 @@ let fpvControls = {
     moveBackward: false,
     moveLeft: false,
     moveRight: false,
-    canJump: false,
+    jump: false,
+    crouch: false,
+    canJump: true,
     velocity: new THREE.Vector3(),
     direction: new THREE.Vector3(),
-    rotation: { x: 0, y: 0 }
+    rotation: { x: 0, y: 0 },
+    verticalVelocity: 0,
+    isJumping: false,
+    isCrouching: false
 };
 let modelBounds = null;
 let groundLevel = 0;
@@ -871,6 +876,20 @@ function onKeyDown(event) {
         case 'KeyD':
             if (fpvMode) fpvControls.moveRight = true;
             break;
+        case 'Space':
+            if (fpvMode) {
+                event.preventDefault();
+                fpvControls.jump = true;
+            }
+            break;
+        case 'ShiftLeft':
+        case 'ShiftRight':
+            if (fpvMode) {
+                event.preventDefault();
+                fpvControls.crouch = true;
+                fpvControls.isCrouching = true;
+            }
+            break;
     }
 }
 
@@ -888,6 +907,16 @@ function onKeyUp(event) {
         case 'KeyD':
             if (fpvMode) fpvControls.moveRight = false;
             break;
+        case 'Space':
+            if (fpvMode) fpvControls.jump = false;
+            break;
+        case 'ShiftLeft':
+        case 'ShiftRight':
+            if (fpvMode) {
+                fpvControls.crouch = false;
+                fpvControls.isCrouching = false;
+            }
+            break;
     }
 }
 
@@ -928,10 +957,13 @@ function enterFPVMode() {
     const centerZ = modelBounds.center.z;
     camera.position.set(centerX, eyeHeight, centerZ);
     
-    // Reset rotation
+    // Reset rotation and movement
     fpvControls.rotation.x = 0;
     fpvControls.rotation.y = 0;
     fpvControls.velocity.set(0, 0, 0);
+    fpvControls.verticalVelocity = 0;
+    fpvControls.isJumping = false;
+    fpvControls.isCrouching = false;
     
     // Update button text
     const fpvBtn = document.getElementById('fpv-btn');
@@ -973,6 +1005,11 @@ function exitFPVMode() {
         fpvControls.moveBackward = false;
         fpvControls.moveLeft = false;
         fpvControls.moveRight = false;
+        fpvControls.jump = false;
+        fpvControls.crouch = false;
+        fpvControls.verticalVelocity = 0;
+        fpvControls.isJumping = false;
+        fpvControls.isCrouching = false;
         
         console.log('Orbit controls restored');
     }, 50);
@@ -982,7 +1019,10 @@ function updateFPVMovement() {
     if (!fpvMode) return;
     
     const delta = 0.016; // Approximate 60fps
-    const moveSpeed = 500.0; // Units per second (1000x faster)
+    const moveSpeed = 100.0; // Units per second (1000x faster)
+    const jumpSpeed = 120.0; // Jump initial velocity (4x higher)
+    const gravity = 120.0; // Gravity strength (4x faster)
+    const crouchHeight = eyeHeight * 0.6; // Crouch height (60% of normal eye height)
     
     // Reset direction
     fpvControls.direction.set(0, 0, 0);
@@ -1010,9 +1050,31 @@ function updateFPVMovement() {
         camera.position.add(fpvControls.direction);
     }
     
-    // Keep camera at eye height (simple ground collision - no falling through)
-    // But allow walking off edges (no invisible walls)
-    camera.position.y = eyeHeight;
+    // Handle jumping
+    if (fpvControls.jump && fpvControls.canJump && !fpvControls.isJumping) {
+        fpvControls.verticalVelocity = jumpSpeed;
+        fpvControls.isJumping = true;
+        fpvControls.canJump = false;
+    }
+    
+    // Apply gravity and vertical movement
+    if (fpvControls.isJumping) {
+        fpvControls.verticalVelocity -= gravity * delta;
+        camera.position.y += fpvControls.verticalVelocity * delta;
+        
+        // Check if landed back on ground
+        const targetHeight = fpvControls.isCrouching ? crouchHeight : eyeHeight;
+        if (camera.position.y <= targetHeight) {
+            camera.position.y = targetHeight;
+            fpvControls.verticalVelocity = 0;
+            fpvControls.isJumping = false;
+            fpvControls.canJump = true;
+        }
+    } else {
+        // Handle crouching when not jumping
+        const targetHeight = fpvControls.isCrouching ? crouchHeight : eyeHeight;
+        camera.position.y = targetHeight;
+    }
     
     // Apply rotation to camera
     camera.rotation.set(fpvControls.rotation.x, fpvControls.rotation.y, 0, 'YXZ');