RenderTexture GetPostTexture(Texture source)
        {
            int id = source.GetInstanceID();

            if (mPostTexture != null && id != mPostTexId)
            {
                ReleasePostTexture();
            }
            if (mPostTexture == null)
            {
                mPostTexId   = id;
                mPostTexture = RenderTexture.GetTemporary(source.width, source.height);
                GraphicHelper.Blur(source, mPostTexture, m_BlurStep, m_BlurIters);
            }
            return(mPostTexture);
        }