TextureImportOverride.cs

using UnityEngine;
using UnityEditor;



class TextureImportOverrides : AssetPostprocessor
{
    void OnPreprocessTexture()
    {
        TextureImporter textureImporter = (TextureImporter)assetImporter;
        if (assetPath.Contains("_S"))
        {
            textureImporter.textureType = TextureImporterType.Sprite;
            textureImporter.textureFormat = TextureImporterFormat.AutomaticTruecolor;
        }

        if (assetPath.Contains("_PF"))
        {
            textureImporter.filterMode = FilterMode.Point;
        }
    }
}