【Unity】標準シェーダーのレンダリングモードをスクリプトから切り替える

public class BlendModeUtils : MonoBehaviour {
    public enum Mode {
        Opaque,
        Cutout,
        Fade,
        Transparent,
    }

    public static void SetBlendMode(Material material, Mode blendMode) {
+       material.SetFloat("_Mode", (float)blendMode);  // <= これが必要

        switch (blendMode) {
        case Mode.Opaque:
            material.SetOverrideTag("RenderType", "");
            material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
            material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero);
            material.SetInt("_ZWrite", 1);
            material.DisableKeyword("_ALPHATEST_ON");
            material.DisableKeyword("_ALPHABLEND_ON");
            material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
            material.renderQueue = -1;
            break;
        case Mode.Cutout:
            material.SetOverrideTag("RenderType", "TransparentCutout");
            material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
            material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero);
            material.SetInt("_ZWrite", 1);
            material.EnableKeyword("_ALPHATEST_ON");
            material.DisableKeyword("_ALPHABLEND_ON");
            material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
            material.renderQueue = 2450;
            break;
        case Mode.Fade:
            material.SetOverrideTag("RenderType", "Transparent");
            material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
            material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
            material.SetInt("_ZWrite", 0);
            material.DisableKeyword("_ALPHATEST_ON");
            material.EnableKeyword("_ALPHABLEND_ON");
            material.DisableKeyword("_ALPHAPREMULTIPLY_ON");
            material.renderQueue = 3000;
            break;
        case Mode.Transparent:
            material.SetOverrideTag("RenderType", "Transparent");
            material.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
            material.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
            material.SetInt("_ZWrite", 0);
            material.DisableKeyword("_ALPHATEST_ON");
            material.DisableKeyword("_ALPHABLEND_ON");
            material.EnableKeyword("_ALPHAPREMULTIPLY_ON");
            material.renderQueue = 3000;
            break;
        }
    }
}