# Block node reference

Block nodes are a specific type of node for the [Master Stack](Master-Stack.md). Each Block represents one piece of surface or vertex data that Shader Graph uses in the final shader output.

| Page | Description |
| :--- | :--- |
| [Built-In Blocks](Built-In-Blocks.md) | Block nodes that are always available, regardless of the active render pipeline. |

## Additional resources

[!include[nodes-example-samples](./snippets/nodes-example-samples.md)]