Rendered View Clipping From Top View

Hello together, I’m working on a component where I display custom meshes. Now I figured out that i need to use the code below to get no clipping when I’m in shaded mode:

   public override BoundingBox ClippingBox
   {
       get
       {
           var boundingBox = BoundingBox.Empty;
           foreach (var brep in _allBrepFaces)
                   boundingBox.Union(brep.GetBoundingBox(false));
           return boundingBox;
       }
   }

Now when I go into rendered view I get a clipping as soon as the object is z < 0

Is there an override for this as well.

    public override void DrawViewportWires(IGH_PreviewArgs args)
    {
        base.DrawViewportWires(args);

        if (_displaySheets == null) return;
        var currMode = Instances.ActiveCanvas.Document.PreviewMode;

        foreach (var displaySheet in _displaySheets)
        {
            var displayNodes = displaySheet.DisplayNodes;

            foreach (var displayNode in displayNodes)
            {
                var color = displayNode.DisplayColor;
                var point = displayNode.DisplayPoint;
                var text = displayNode.DisplayInfo;
                var displayFace = displayNode.DisplayFace;
                var id = displayNode.FaceId;
                var textColor = displayNode.TextColor;

                var material = new DisplayMaterial(color);

                if (currMode == GH_PreviewMode.Shaded)
                {
                    args.Display.DrawBrepShaded(displayFace, material);
                }
                else
                {
                    var edges = displayFace.Edges;
                    foreach (var edge in edges)
                    {
                        args.Display.DrawCurve(edge, color, 2);
                    }
                }

                if (_displayTextInfo)
                {
                    var textPoint = new Point3d(point.X, point.Y, point.Z + 0.1);
                    args.Display.Draw2dText(text, textColor, textPoint, true, 14);
                    args.Display.DrawPoint(point, PointStyle.RoundSimple, 5, DisplayHelpers.AdjustColorBrightness(color, 1.2f, 1f));
                }
            }
        }
    }

This is the function which is rendering the meshes

Thanks already in advanced!