---
title: "init(geometry:surface:lighting:)"
framework: realitykit
role: symbol
role_heading: Initializer
path: "realitykit/lowlevelmaterialresource/descriptor/init(geometry:surface:lighting:)"
---

# init(geometry:surface:lighting:)

Creates a descriptor from the three shader stages.

## Declaration

```swift
init(geometry: LowLevelMaterialResource.GeometryModifier, surface: LowLevelMaterialResource.SurfaceShader, lighting: LowLevelMaterialResource.LightingFunction)
```

## Parameters

- `geometry`: The vertex-stage geometry modifier.
- `surface`: The fragment-stage surface shader.
- `lighting`: The lighting evaluation function.