Added a SetTexture method to BrushShader, this way, new texture dependency properties can be created in new brushes.

public static readonly DependencyProperty TextureProperty = DependencyProperty.Register(

"Texture", typeof(ImageSource), typeof(NoiseBrush), new PropertyMetadata(null, OnTextureChanged));

private static void OnTextureChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)

{

if (d is NoiseBrush brush)

{

brush.SetTexture((ImageSource)e.NewValue, 0);

}

}

Texture2D input: register(t4);

SamplerState inputSampler: register(s4);

half4 GetCustomPattern(in In i)

{

return input.Sample(inputSampler, i.uv0);

}