ArcGIS Pro 2.6 API Reference Guide
IsMaterialTextured Method
Example 

ArcGIS.Core.Geometry Namespace > Multipatch Class : IsMaterialTextured Method
The index of the material. Must be greater than or equal to zero and less than MaterialCount. Get the index for a patch by calling GetPatchMaterialIndex.
Gets a value indicating if the specified material contains a texture image.
Syntax
public bool IsMaterialTextured( 
   int materialIndex
)
Public Function IsMaterialTextured( _
   ByVal materialIndex As Integer _
) As Boolean

Parameters

materialIndex
The index of the material. Must be greater than or equal to zero and less than MaterialCount. Get the index for a patch by calling GetPatchMaterialIndex.
Exceptions
ExceptionDescription
The material index must be >= 0.
The material index must be less than the number of materials in the multipatch.
Example
/// <summary>
/// This method gets the material texture image of a multipatch.
/// This method must be called on the MCT. Use QueuedTask.Run.
/// </summary>
/// <param name="multipatch">The input multipatch.</param>
/// <param name="patchIndex">The index of the patch (part) for which to get the material texture.</param>
public void GetMultipatchTextureImage(Multipatch multipatch, int patchIndex)
{
  int materialIndex = multipatch.GetPatchMaterialIndex(patchIndex);
  if (!multipatch.IsMaterialTextured(materialIndex))
    return;

  esriTextureCompressionType compressionType = multipatch.GetMaterialTextureCompressionType(materialIndex);
  string ext = compressionType == esriTextureCompressionType.CompressionJPEG ? ".jpg" : ".dat";
  byte[] textureBuffer = multipatch.GetMaterialTexture(materialIndex);

  Stream imageStream = new MemoryStream(textureBuffer);
  System.Drawing.Image image = System.Drawing.Image.FromStream(imageStream);
  image.Save(@"C:\temp\myImage" + ext);
}
Requirements

Target Platforms: Windows 10, Windows 8.1, Windows 7

See Also

Reference

Multipatch Class
Multipatch Members