---
title: "depthwiseConvolution3D(_:weights:descriptor:name:)"
framework: metalperformanceshadersgraph
role: symbol
role_heading: Instance Method
path: "metalperformanceshadersgraph/mpsgraph/depthwiseconvolution3d(_:weights:descriptor:name:)"
---

# depthwiseConvolution3D(_:weights:descriptor:name:)

Creates a 3D depthwise convolution operation and returns the result tensor.

## Declaration

```swift
func depthwiseConvolution3D(_ source: MPSGraphTensor, weights: MPSGraphTensor, descriptor: MPSGraphDepthwiseConvolution3DOpDescriptor, name: String?) -> MPSGraphTensor
```

## Parameters

- `source`: A 3D Image source as tensor - must be at least rank=4 (CDHW when channelDimensionIndex = -4).
- `weights`: The weights tensor, must be rank=4 - axes are interpreted as CDHW when channelDimensionIndex = -4 .
- `descriptor`: The descriptor object that specifies strides, dilation rates and paddings.
- `name`: The name for the operation.

## Return Value

Return Value A valid MPSGraphTensor object

## Discussion

Discussion Works exactly like depthwise convolution2D, but in three dimensions. Supports different layouts with the channelDimensionIndex property. If your weights need a different layout add a permute operation on them before this operation.