# mtion worlds SDK FAQs

## I downloaded Unity but the SDK isn't compatible?

mtion worlds SDK only works with Unity version 2021.3.25f1 which can be downloaded from The Unity download archive <https://unity.com/releases/editor/archive>

## I'm trying to use the SDK Git url but its not working?

In order to use the Git URL you will need Git installed from <https://git-scm.com/> &#x20;

Another option is to download the latest .tgz file from <https://github.com/mtion-tv/MtionSDK/releases>[ ](https://github.com/mtion-tv/MtionSDK/releases)and in Unity use the option 'install from Tarball'.&#x20;

## How do I update the SDK when a new version is released?

If you are using Git url, then the updates are always automatic.&#x20;

If you are using the Tarball, you should be able to just load the new .tgz file. Don't need to uninstall first, assets should be overwritten with new ones.

## I imported a world/Asset into mtion worlds but I don't see it?

If haven't you will have to restart mtion worlds when you import anything from unity in order for it to show up.

## Do certain shaders work with mtion worlds?

Most shaders such as VRM and Poiyomi do work with mtion worlds. If you encountered a shader that does not work, please let us know in the mtion Discord SDK support channel.