# Sandbox.Gradient.AddAlpha

## Overload 1

```csharp
int AddAlpha(float x, float alpha)
```

Add an alpha position

### Parameters

- `x` (`float`)
- `alpha` (`float`)

### Returns

`int`

## Overload 2

```csharp
int AddAlpha(in AlphaFrame keyframe)
```

### Parameters

- `in keyframe` (`AlphaFrame`)

### Returns

`int`

Declared in [Sandbox.Gradient](/api/Sandbox.Gradient).
Assembly: `Sandbox.System`.