ScriptableRenderPipeline/ImageTemplates/Editor/TemplatePreprocessor.cs

using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using UnityEditor;

/// <summary>
/// Template preprocessor.
/// This script forces all textures in the folder 'ImageTemplates' to have no compression, meaning import times will be much faster, especially when switching platforms
/// </summary>

public class TemplatePreprocessor : AssetPostprocessor {

	void OnPreprocessTexture()
	{
		if (assetPath.Contains("ImageTemplates"))
		{
			TextureImporter textureImporter  = (TextureImporter)assetImporter;
			textureImporter.textureCompression = TextureImporterCompression.Uncompressed;
		}
	}
}