diff --git a/ApplicationCode/ProjectDataModel/RimContourMapProjection.cpp b/ApplicationCode/ProjectDataModel/RimContourMapProjection.cpp
index 2bc3509a8f..2938eec0b3 100644
--- a/ApplicationCode/ProjectDataModel/RimContourMapProjection.cpp
+++ b/ApplicationCode/ProjectDataModel/RimContourMapProjection.cpp
@@ -976,11 +976,11 @@ void RimContourMapProjection::generateTrianglesWithVertexValues()
                                 std::vector<cvf::Vec3d> clippedTriangle;
                                 if ( v == clippedPolygon.size() - 1 )
                                 {
-                                    clippedTriangle = {clippedPolygon[v], clippedPolygon[0], baryCenter};
+                                    clippedTriangle = { clippedPolygon[v], clippedPolygon[0], baryCenter };
                                 }
                                 else
                                 {
-                                    clippedTriangle = {clippedPolygon[v], clippedPolygon[v + 1], baryCenter};
+                                    clippedTriangle = { clippedPolygon[v], clippedPolygon[v + 1], baryCenter };
                                 }
                                 polygonTriangles.push_back( clippedTriangle );
                             }
@@ -1106,7 +1106,10 @@ void RimContourMapProjection::generateContourPolygons()
                 if ( legendConfig()->mappingMode() == RimRegularLegendConfig::MappingType::LINEAR_DISCRETE ||
                      legendConfig()->mappingMode() == RimRegularLegendConfig::MappingType::LINEAR_CONTINUOUS )
                 {
-                    contourLevels.front() -= 0.01 * ( contourLevels.back() - contourLevels.front() );
+                    const int fudgeFactor = 0.01;
+                    // Adjust contour levels slightly to avoid weird visual artifacts due to numerical error.
+                    contourLevels.front() -= fudgeFactor * ( contourLevels.back() - contourLevels.front() );
+                    contourLevels.back() += fudgeFactor * ( contourLevels.back() - contourLevels.front() );
                 }
                 else
                 {