# Havok move base sphere not working

**URL:** <https://forum.babylonjs.com/t/havok-move-base-sphere-not-working/41832>\
**Category:** Questions\
**Created:** [June 22, 2023, 6:24am UTC](https://forum.babylonjs.com/t/havok-move-base-sphere-not-working/41832 "2023-06-22T06:24:27Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![Marcello\_Fabbiani](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/marcello_fabbiani/32/33022_2.png) [@Marcello\_Fabbiani](https://forum.babylonjs.com/u/Marcello_Fabbiani)\
**Post date:** [June 22, 2023, 6:24am UTC](https://forum.babylonjs.com/t/havok-move-base-sphere-not-working/41832/1 "2023-06-22T06:24:27Z")

</div>

> **[Babylon.js Playground](https://playground.babylonjs.com/#Z8HTUN%23435)**
>
> Babylon.js playground is a live editor for Babylon.js WebGL 3D scenes

i am testing havok heightmaps and can’t make this sphere move over

---

<div class="post-metadata">

**Author:** ![Cedric](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/cedric/32/2742_2.png) [@Cedric](https://forum.babylonjs.com/u/Cedric)\
**Post date:** [June 22, 2023, 8:53am UTC](https://forum.babylonjs.com/t/havok-move-base-sphere-not-working/41832/2 "2023-06-22T08:53:49Z")

</div>

```auto
 //sphere.physicsImpostor.setLinearVelocity(newpos)

```

Impostors are V1 physics. You are using V2 with Havok. It’s not possible to mix both. Please check documentation on forces/impulse : [Forces | Babylon.js Documentation](https://doc.babylonjs.com/features/featuresDeepDive/physics/forces)

---

<div class="post-metadata">

**Author:** ![Mr\_Anderson](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/mr_anderson/32/33232_2.png) [@Mr\_Anderson](https://forum.babylonjs.com/u/Mr_Anderson)\
**Post date:** [April 18, 2024, 6:25am UTC](https://forum.babylonjs.com/t/havok-move-base-sphere-not-working/41832/3 "2024-04-18T06:25:34Z")

</div>

Is there no way to use impostors with havok? Is aggregate the same as impostor?

---

<div class="post-metadata">

**Author:** ![Cedric](https://sea2.discourse-cdn.com/flex024/user_avatar/forum.babylonjs.com/cedric/32/2742_2.png) [@Cedric](https://forum.babylonjs.com/u/Cedric)\
**Post date:** [April 18, 2024, 7:44am UTC](https://forum.babylonjs.com/t/havok-move-base-sphere-not-working/41832/4 "2024-04-18T07:44:17Z")

</div>

Impostor is a class from Physics V1 api. Aggregate is roughly the same concept (physics body + collision shape together) for physics V2