Unity - 스크립트로 Shader Rendering Mode 변경하기

스크립트로 Shader의 Rendering Mode를 Opaque, Transparent로 변경하는 경우가 종종 있다.

 

이 때 분명히 Rendering Mode를 변경했는데, 반영이 되지 않는다면 아래와 같은 코드를 적용하면 된다.

 

public enum BlendMode
    {
        Opaque = 0,
        Cutout,
        Fade,
        Transparent
    }

public static void changeRenderMode(Material standardShaderMaterial, BlendMode blendMode)
    {
        switch (blendMode)
        {
            case BlendMode.Opaque:
                standardShaderMaterial.SetFloat("_Mode",0.0f);
                standardShaderMaterial.SetOverrideTag("RenderType", "Opaque");
                standardShaderMaterial.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
                standardShaderMaterial.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero);
                standardShaderMaterial.SetInt("_ZWrite", 1);
                standardShaderMaterial.DisableKeyword("_ALPHATEST_ON");
                standardShaderMaterial.DisableKeyword("_ALPHABLEND_ON");
                standardShaderMaterial.DisableKeyword("_ALPHAPREMULTIPLY_ON");
                standardShaderMaterial.renderQueue = -1;
                break;
            case BlendMode.Cutout:
                standardShaderMaterial.SetFloat("_Mode",1.0f);
                standardShaderMaterial.SetOverrideTag("RenderType", "Opaque");
                standardShaderMaterial.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
                standardShaderMaterial.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.Zero);
                standardShaderMaterial.SetInt("_ZWrite", 1);
                standardShaderMaterial.EnableKeyword("_ALPHATEST_ON");
                standardShaderMaterial.DisableKeyword("_ALPHABLEND_ON");
                standardShaderMaterial.DisableKeyword("_ALPHAPREMULTIPLY_ON");
                standardShaderMaterial.renderQueue = 2450;
                break;
            case BlendMode.Fade:
                standardShaderMaterial.SetFloat("_Mode",2.0f);
                standardShaderMaterial.SetOverrideTag("RenderType", "Transparent");
                standardShaderMaterial.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.SrcAlpha);
                standardShaderMaterial.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
                standardShaderMaterial.SetInt("_ZWrite", 0);
                standardShaderMaterial.DisableKeyword("_ALPHATEST_ON");
                standardShaderMaterial.EnableKeyword("_ALPHABLEND_ON");
                standardShaderMaterial.DisableKeyword("_ALPHAPREMULTIPLY_ON");
                standardShaderMaterial.renderQueue = 3000;
                break;
            case BlendMode.Transparent:
                standardShaderMaterial.SetFloat("_Mode",3.0f);
                standardShaderMaterial.SetOverrideTag("RenderType", "Transparent");
                standardShaderMaterial.SetInt("_SrcBlend", (int)UnityEngine.Rendering.BlendMode.One);
                standardShaderMaterial.SetInt("_DstBlend", (int)UnityEngine.Rendering.BlendMode.OneMinusSrcAlpha);
                standardShaderMaterial.SetInt("_ZWrite", 0);
                standardShaderMaterial.DisableKeyword("_ALPHATEST_ON");
                standardShaderMaterial.DisableKeyword("_ALPHABLEND_ON");
                standardShaderMaterial.EnableKeyword("_ALPHAPREMULTIPLY_ON");
                standardShaderMaterial.renderQueue = 3000;
                break;
        }
    }

 

ShaderMaterial의 renderQueue Option으로 렌더링 순서를 정할 수 있는데, 겹쳐있는 Object들의 renderQueue가 같아 진하게 보이는 현상이 발생할 수 있다.

 

이 때 가장 바깥쪽에 있는 Object의 renderQueue를 3001로 변경하면 정상적으로 보여줄 수 있다.