---
title: "init(textureSize:forLocation:lightsToConsider:objectsToConsider:reflectiveCubemap:irradianceCubemap:)"
framework: modelio
role: symbol
role_heading: Initializer
path: "modelio/mdllightprobe/init(texturesize:forlocation:lightstoconsider:objectstoconsider:reflectivecubemap:irradiancecubemap:)"
---

# init(textureSize:forLocation:lightsToConsider:objectsToConsider:reflectiveCubemap:irradianceCubemap:)

Creates a light probe representing the shading environment at a specific point in a scene.

## Declaration

```swift
init?(textureSize: Int, forLocation transform: MDLTransform, lightsToConsider: [MDLLight], objectsToConsider: [MDLObject], reflectiveCubemap: MDLTexture?, irradianceCubemap: MDLTexture?)
```

## Parameters

- `textureSize`: The size, in pixels for one side of a cube, of texture image to generate.
- `transform`: The point in a scene at which to generate the light probe.
- `lightsToConsider`: An array of other lights to be used in the shading environment around the generated light probe.
- `objectsToConsider`: An array of scene content—doc://com.apple.modelio/documentation/ModelIO/MDLMesh instances or doc://com.apple.modelio/documentation/ModelIO/MDLObject instances that contain doc://com.apple.modelio/documentation/ModelIO/MDLMesh instances—to be used in the shading environment around the generated light probe.
- `reflectiveCubemap`: An optional cube map texture containing the environment as seen from the light probe’s position. Leave this parameter nil to generate a reflective texture.
- `irradianceCubemap`: An optional cube map texture containing samples of the total light arriving at the light probe’s position from every direction. Leave this parameter nil to generate an irradiance texture.

## Return Value

Return Value A new light probe object.

## Discussion

Discussion The behavior of this method changes depending on whether you specify textures for the reflectiveCubemap and irradianceCubemap parameters. If the reflectiveCubemap parameter is nil, this method renders an environment map texture by raytracing a scene containing the lights and meshes (with materials) specified in the lightsToConsider and  objectsToConsider parameters, using the camera position specified in the transform parameter. If the irradianceCubemap parameter is nil, this method generates an irradiance texture from the reflective texture (either the texture specified in the reflectiveCubemap parameter, or the generated texture if that parameter is nil) using the MDLTexture class.