diff --git a/src/components/InteractiveObjects/GenericObject.vue b/src/components/InteractiveObjects/GenericObject.vue
index 6bda88b..bfe8ffd 100644
--- a/src/components/InteractiveObjects/GenericObject.vue
+++ b/src/components/InteractiveObjects/GenericObject.vue
@@ -8,7 +8,8 @@
         <v-textarea :label="l.description" v-model="modelValue.description" class="mt-3"></v-textarea>
         <v-checkbox density="compact" v-model="modelValue.hud" hide-details :label="l.viewInHUD"></v-checkbox>
         <v-checkbox density="compact" v-model="modelValue.exclude" hide-details :label="l.disableInteractions"></v-checkbox>
-        <v-checkbox density="compact" v-model="modelValue.noPhysics" hide-details :label="l.disableCollisions"></v-checkbox>
+        <v-select :label="l.collisionType" v-model="modelValue.collisionType" density="compact" hide-details
+            :items="collisionTypes"></v-select>
         <v-img :src="`/asset/thumb/${modelValue.go}.webp`" />
         <div class="text-caption text-center">{{ modelValue.title }}</div>
     </div>
@@ -19,11 +20,13 @@
 export default {
     data(){
         return {
-            active: false
+            active: false,
+            collisionTypes: []
         }
     },
     mounted(){
         this.active = true;
+        this.collisionTypes = Object.keys(this.l.collisionTypes).map(t=>({title: this.l.collisionTypes[t], value: t}))
     },
     props:{
         modelValue: Object
diff --git a/src/components/InteractiveObjects/MazeQuizGame/MazeQuizGame.js b/src/components/InteractiveObjects/MazeQuizGame/MazeQuizGame.js
index 4310f9d..ec8aac9 100644
--- a/src/components/InteractiveObjects/MazeQuizGame/MazeQuizGame.js
+++ b/src/components/InteractiveObjects/MazeQuizGame/MazeQuizGame.js
@@ -42,7 +42,6 @@ class MazeQuizGame extends EventManager {
     constructor(engine, data) {
         super();
         this.data = data;
-        data.noPhysics = true;
 
         this.params = { ...params, mazeFile: data.style || 'quiz-s2.gltf', io: this }
         
diff --git a/src/components/InteractiveObjects/Particles.js b/src/components/InteractiveObjects/Particles.js
index 3c9939d..afc6144 100644
--- a/src/components/InteractiveObjects/Particles.js
+++ b/src/components/InteractiveObjects/Particles.js
@@ -10,7 +10,6 @@ import * as BufferGeometryUtils from 'three/addons/utils/BufferGeometryUtils.js'
 
 class Particles {
     constructor(engine, data) {
-        data.noPhysics = true;
         const { x, y, count, w, h } = data;
         let positions = Particles.positions(count, w, h);
         return new Promise(async (resolve, reject) => {
diff --git a/src/lib/GameEngine.js b/src/lib/GameEngine.js
index 29bb9fb..8289819 100644
--- a/src/lib/GameEngine.js
+++ b/src/lib/GameEngine.js
@@ -258,7 +258,7 @@ class GameEngine extends EventManager{
             event.preventDefault();
             if (this.hero){
                 if (!this.pointerControls.isLocked){
-                    this.hero.cameraZ += event.deltaY / 100;
+                    this.hero.cameraZ += event.deltaY * 0.005;
                 }
             }else{
                 this.camera.zoom -= event.deltaY / (1000 / this.camera.zoom);
diff --git a/src/lib/GameManager.js b/src/lib/GameManager.js
index e84e3fe..ec52125 100644
--- a/src/lib/GameManager.js
+++ b/src/lib/GameManager.js
@@ -52,12 +52,7 @@ class GameManager{
                     let env = await engine.load(scene.data.$scene.asset.name);
                     this.setObjectAttributes(sceneObjects, scene.data, env.scene, env, null);
                     if (engine.opts.mode != 'GameDesigner'){
-                        env.scene.traverse(o=>{
-                            if (o.name.startsWith('land') || o.name == 'Sphere'){
-                                //this.debug('Fixing ground. TODO!!!')
-                                engine.physics.add(o, 'fixed', true, undefined, 'mesh', { root: env.scene}) 
-                            }
-                        })
+                        engine.physics.apply(env.scene)
                     }
                     engine.activeObjects.add(env.scene);
                 }
@@ -86,13 +81,14 @@ class GameManager{
                                 if (io.source?.animations?.length){
                                     engine.playAnimation(engine.scene, io.source.animations[0]);
                                 }
-
-                                if (!i.data.noPhysics){
+                                if (i.data.collisionType == 'basic'){
                                     let bb = engine.meshUtils.getBoundingBox(io.object);
                                     let bbs = engine.meshUtils.getBoundingBoxSize(bb);
                                     engine.physics.add(io.object, 'fixed', false, undefined, 'capsule', {
                                         radius: Math.max(bbs.x, bbs.z)/2, halfHeight: bbs.y/2
                                     })
+                                }else if (i.data.collisionType == 'objectDefinied'){
+                                    engine.physics.apply(io.object)
                                 }
                             }
                             io.addEventListener('finish', ()=>{
diff --git a/src/lib/Hero.js b/src/lib/Hero.js
index 343b6ee..2b3e7bd 100644
--- a/src/lib/Hero.js
+++ b/src/lib/Hero.js
@@ -13,29 +13,29 @@ class Hero{
     }
 
     set cameraZ(v){
-        this.#cameraZ = Math.min(Math.max(v, 1), 12);
-        if (this.#cameraZ == 1 && !this.fpv){
+        this.#cameraZ = Math.min(Math.max(v, this.cameraZMin), this.cameraZMax);
+        if (this.#cameraZ == this.cameraZMin && !this.fpv){
             if (this.engine.renderer.xr.isPresenting){
                 this.#cameraZ = 0;
                 this.fpv = true;
-                this.cameraY = this.size.y*0.9;
+                this.cameraY = this.cameraYBase;
                 this.camera.rotation.set(0,0,0);
             }else{
                 this.engine.pointerControls.lock(true).then(()=>{
                     this.#cameraZ = 0;
                     this.fpv = true;
-                    this.cameraY = this.size.y*0.9;
+                    this.cameraY = this.cameraYBase;
                     this.engine.pointerControls.once('unlock', ()=>{
                         this.fpv = false;
-                        this.cameraY = this.size.y*1.5;
+                        this.cameraY = this.cameraYBase * 1.5;
                     })
                 }).catch(err=>{
                     console.log(err);
                 })
             }
-        }else if(this.#cameraZ > 1 && this.fpv){
+        }else if(this.#cameraZ > this.cameraZMin && this.fpv){
             this.fpv = false;
-            this.cameraY = this.size.y*1.5;
+            this.cameraY = this.cameraYBase * 1.5;
         }
         //this.engine.dashboard.updateText(this.#cameraZ);
     }
@@ -67,7 +67,12 @@ class Hero{
         // let center = getBoundingBoxCenterPoint(bb, this.model.userData.object.position)
         let bb = engine.meshUtils.getBoundingBox(io.object);
         this.size = engine.meshUtils.getBoundingBoxSize(bb);
-        console.log('Hero size is', this.size);
+        //console.log('Hero size is', this.size);
+        this.cameraYBase = this.size.y / this.engine.scale;
+        this.cameraZMin = 1 / this.engine.scale;
+        this.cameraZMax = 12 / this.engine.scale;
+        this.#cameraZ = this.cameraZDefault = 4 / this.engine.scale;
+
         // let center = getBoundingBoxCenterPoint(bb, io.object.position)
 
         // console.log('hero', size, center, size.y - 2*this.characterGapOffset)
@@ -97,7 +102,7 @@ class Hero{
         this.orbitControl = this.engine.orbitControls
         //this.camera = this.engine.camera;
         this.camera = this.engine.cameraWorld;
-        this.cameraY = this.size.y * 1.5;
+        this.cameraY = this.cameraYBase * 1.5;
 
         this.direction = this.model.rotation.y;
         //this.directionVelocity = 0;
@@ -150,7 +155,7 @@ class Hero{
         }
         if (!this.fpv && !this.model.visible){
             this.model.visible = true;
-            this.#cameraZ = 4
+            this.#cameraZ = this.cameraZDefault;
             this.engine.camera.fov = 45;
             this.engine.camera.updateProjectionMatrix();
         }
diff --git a/src/lib/Physics.js b/src/lib/Physics.js
index 58eb350..e0588f7 100644
--- a/src/lib/Physics.js
+++ b/src/lib/Physics.js
@@ -32,7 +32,7 @@ class Physics{
 
     add = (mesh, rigidBodyType, autoAnimate = true, postPhysicsFn, colliderType, colliderSettings = {}) => {
         const rigidBodyDesc = RAPIER.RigidBodyDesc[rigidBodyType]()
-        let position, quaternion;
+        let position, quaternion, scale = new Vector3(1,1,1);
         // if (colliderSettings.root){
         //     // mesh.getWorldPosition(position = new Vector3());
         //     // mesh.getWorldQuaternion(quaternion = new Quaternion());
@@ -42,6 +42,15 @@ class Physics{
             position = mesh.position;
             quaternion = mesh.quaternion;
         //}
+
+        if (colliderSettings.root){
+            let p = mesh;
+            while (p != colliderSettings.root.parent) {
+                scale.multiply(p.scale);
+                p = p.parent;
+            } 
+        }
+
         rigidBodyDesc.setTranslation(position.x, position.y, position.z)
         quaternion && rigidBodyDesc.setRotation(quaternion)
 
@@ -76,7 +85,7 @@ class Physics{
                 const position = mesh.geometry.getAttribute( 'position' );
                 for ( let i = 0; i < position.count; i ++ ) {
                     vertex.fromBufferAttribute( position, i );
-                    vertices.push( vertex.x, vertex.y, vertex.z );
+                    vertices.push( vertex.x * scale.x, vertex.y * scale.x, vertex.z * scale.x );
                 }
 
                 // if the buffer is non-indexed, generate an index buffer
@@ -111,6 +120,14 @@ class Physics{
         return physicsObject
     }
 
+    apply(object){
+        object.traverse(o=>{
+            if (o.name.startsWith('land') || o.name.endsWith('-physics')){
+                this.add(o, 'fixed', true, undefined, 'mesh', { root: object}) 
+            }
+        })
+    }
+
     clear(){
         this.physicsObjects.forEach(po=>{
             po.characterController && this.world.removeCharacterController(po.characterController)
diff --git a/src/plugins/lang.js b/src/plugins/lang.js
index 7b15071..044da83 100644
--- a/src/plugins/lang.js
+++ b/src/plugins/lang.js
@@ -48,7 +48,13 @@ const lang = {
         minActivationScore: 'Minimum level score for activation',
         viewInHUD: 'Observe in head-up display',
         disableInteractions: 'Disable interactions',
-        disableCollisions: 'Disable collisions',
+        collisionType: 'Collision type',
+        collisionTypes: {
+            no: 'No collisions',
+            basic: 'Basic (sphere around object)',
+            objectDefinied: 'Defined in object',
+            advanced: 'Complex (not implemented)'
+        },
         dimensions: 'Dimensions',
         elementsCount: 'Number of elements',
         particleWidth: 'Particle width',
@@ -204,7 +210,13 @@ const lang = {
         minActivationScore: 'Минимален брой точки за активиране',
         viewInHUD: 'Показване в HUD (head-up display)',
         disableInteractions: 'Без взаимодействия',
-        disableCollisions: 'Без колизии',
+        collisionType: 'Тип колизии',
+        collisionTypes: {
+            no: 'Без',
+            basic: 'Базови (сфера около обекта)',
+            objectDefinied: 'От дефиницията на обекта',
+            advanced: 'С голяма точност (not implemented)'
+        },
         dimensions: 'Размери',
         elementsCount: 'Брой елементи',
         particleWidth: 'Ширина на частиците',