Sample Texture 2D Array node

The Sample Texture 2D Array node samples a Texture 2D Array asset and returns a Vector 4 color value. You can specify the UV coordinates for a texture sample and use a Sampler State node to define a specific Sampler State. The node's Index input port specifies which index of a Texture 2D Array to sample.

For more information about Texture 2D Arrays, see Texture Arrays in the Unity User manual.

[!includenodes-sample-errors]

The Sample Texture 2D Array node is under the Input > Texture category in the Create Node menu.

Compatibility

The Sample Texture 3D [!includenodes-compatibility-all]

[!includenodes-sample-fragment-lod]

Inputs

The Sample Texture 3D [!includenodes-inputs]

Name	Type	Binding	Description
Texture Array	Texture 2D Array	None	The Texture 2D Array asset to sample.
Index	Float	None	The index of the specific Texture in the Texture array to sample. The index value is the Texture's location in the Texture array. The index values in an array always start at 0. An array with four textures would have locations 0, 1, 2, and 3.
UV	Vector 2	None	UV coordinates to use to sample the Texture.
Sampler	Sampler State	Default Sampler State	The Sampler State and settings to use to sample the texture.
LOD	Float	LOD	NOTE: The LOD Input port only displays if Mip Sampling Mode is LOD. For more information, refer to Additional node settings. The specific mip to use when sampling the Texture.
UV	Vector 2	UV	The UV coordinates to use to sample the texture.
Sampler	Sampler State	Default Sampler State	The Sampler State and settings to use to sample the texture.
LOD	Float	LOD	The specific mip to use when sampling the Texture. NOTE The LOD Input port only displays if Mip Sampling Mode is LOD. For more information, refer to Additional node settings.
Bias	Float	Bias	NOTE: The Bias Input port only displays if Mip Sampling Mode is Bias. For more information, refer to Additional node settings. If Use Global Mip Bias is enabled, Unity adds this Bias amount to the Global Mip Bias for a texture's mip calculation. If Global Mip Bias is disabled, Unity uses this Bias amount instead of the Global Mip Bias.
DDX	Float	DDY	NOTE: The DDX Input port only displays if Mip Sampling Mode is Gradient. For more information, refer to Additional node settings. The specific DDX value to use to calculate the texture's mip when sampling. For more information on DDX values for mipmaps, refer to Mipmaps introduction in the Unity User Manual.
DDY	Float	DDY	NOTE The DDY Input port only displays if Mip Sampling Mode is Gradient. For more information, refer to Additional node settings. The specific DDY value to use to calculate the texture's mip when sampling. For more information on DDY values for mipmaps, refer to Mipmaps introduction> in the Unity User Manual.

Additional node settings

The Sample Texture 3D [!includenodes-additional-settings]

[!includenodes-sample-mip-bias-sample-mode-table]

Outputs

The Sample Texture 3D [!includenodes-outputs]

[!includenodes-sample-rgba-output-table]

Example graph usage

In the following example, the Sample Texture 2D Array node samples a Texture array that has 4 different cloth normal maps. Change the number given to the Index port as an input, and the Sample Texture 2D Array node can sample a specific normal map from the array. The Index value changes the output the node sends to the Normal Unpack node, and the Normal (Tangent Space) Block node in the Master Stack.

Generated code example

[!includenodes-generated-code]:

float4 _SampleTexture2DArray_RGBA = SAMPLE_TEXTURE2D_ARRAY(Texture, Sampler, UV, Index);
float _SampleTexture2DArray_R = _SampleTexture2DArray_RGBA.r;
float _SampleTexture2DArray_G = _SampleTexture2DArray_RGBA.g;
float _SampleTexture2DArray_B = _SampleTexture2DArray_RGBA.b;
float _SampleTexture2DArray_A = _SampleTexture2DArray_RGBA.a;

[!includenodes-related] Sample Texture 3D node:

6.2 KiB Raw Blame History