---
title: source
framework: realitykit
role: symbol
role_heading: Instance Property
path: realitykit/blendtreesourcenode/source
---

# source

The blend node’s animation.

## Declaration

```swift
var source: (any AnimationDefinition)?
```

## See Also

### Configuring a blend tree animation node

- [name](realitykit/blendtreesourcenode/name.md)
- [weight](realitykit/blendtreesourcenode/weight.md)