From 270a9651ea7a1cd51a43e98a55f5cee77896ffa6 Mon Sep 17 00:00:00 2001
From: m-kro <m.barthauer@t-online.de>
Date: Thu, 26 Oct 2023 14:29:22 +0200
Subject: [PATCH] fix ref #13993

Signed-off-by: m-kro <m.barthauer@t-online.de>
---
 src/osgview/GUIOSGBuilder.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/osgview/GUIOSGBuilder.cpp b/src/osgview/GUIOSGBuilder.cpp
index af8aae5178d..426f992d58a 100644
--- a/src/osgview/GUIOSGBuilder.cpp
+++ b/src/osgview/GUIOSGBuilder.cpp
@@ -185,7 +185,7 @@ GUIOSGBuilder::buildOSGEdgeGeometry(const MSEdge& edge,
         if (extrude) {
             int index = upperShapeSize;
             for (int k = 0; k < upperShapeSize + sizeDiff; ++k, ++index) {
-                (*osg_coords)[index].set((*osg_coords)[k].x(), (*osg_coords)[k].y(), 0.);
+                (*osg_coords)[index].set((*osg_coords)[k].x(), (*osg_coords)[k].y(), (*osg_coords)[k].z() - zOffset);
             }
             // extrude edge to create the kerb
             for (int i = 0; i < upperShapeSize + sizeDiff; ++i) {