You just purchased some assets from Unity Asset Store and imported it into your project but the assets are all purple. So, what happened?!
The most common cause is because that you are using universal render pipeline (URP).
If you are using URP, assets that are imported from another pipeline may appear purple. You will need to upgrade the shader.
To upgrade built-in Shaders:
Open your Project in Unity, and go to Edit > Render Pipeline > Universal Render Pipeline. ( see image below)
According to your needs, select either Upgrade Project Materials to UniversalRP Materials or Upgrade Selected Materials to UniversalRP Materials.
See more here: https://docs.unity3d.com/Packages/com.unity.render-pipelines.universal@7.0/manual/upgrading-your-shaders.html
To upgrade built-in Shaders:
Open your Project in Unity, and go to Edit > Render Pipeline > Universal Render Pipeline. ( see image below)
According to your needs, select either Upgrade Project Materials to UniversalRP Materials or Upgrade Selected Materials to UniversalRP Materials.
See more here: https://docs.unity3d.
Most of the time, there's no need to make any more adjustment after upgrade. But we do have some clients feedback to us that some of the materials do not have transparency after upgrade. It's probably a bug. This happen to some of the assets. For e.g. the trees, and the faces in some modular character packs. To fix that, make sure that the alpha clipping is checked in the inspector.
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