---
title: SCNBufferFrequency.perShadable
framework: scenekit
role: symbol
role_heading: Case
path: scenekit/scnbufferfrequency/pershadable
---

# SCNBufferFrequency.perShadable

Execute the binding handler once for each frame, for each node, for each material or geometry to be rendered using the shader.

## Declaration

```swift
case perShadable
```

## Discussion

Discussion Use this option when the contents of the buffer should be specific to each geometry or material whose program property is set to this shader. For example, a material-specific buffer might contain information to be used in animating a texture.

## See Also

### Constants

- [SCNBufferFrequency.perFrame](scenekit/scnbufferfrequency/perframe.md)
- [SCNBufferFrequency.perNode](scenekit/scnbufferfrequency/pernode.md)