UnityEditor.Texture3DInspector.InitPreview C# (CSharp) Method

        private void InitPreview()
        {
            if (this.m_PreviewUtility == null)
            {
                this.m_PreviewUtility = new PreviewRenderUtility();
                this.m_PreviewUtility.m_CameraFieldOfView = 30f;
            }
            if (this.m_Mesh == null)
            {
                this.m_Mesh = PreviewRenderUtility.GetPreviewSphere();
            }
            if (this.m_Material == null)
            {
                this.m_Material = EditorGUIUtility.LoadRequired("Previews/Preview3DTextureMaterial.mat") as Material;
            }
        }