diff --git a/src/libslic3r/LayerRegion.cpp b/src/libslic3r/LayerRegion.cpp
index fb06feb..12f3a66 100644
--- a/src/libslic3r/LayerRegion.cpp
+++ b/src/libslic3r/LayerRegion.cpp
@@ -618,14 +618,14 @@ Surfaces expand_bridges_detect_orientations(Surfaces &
 }
 
 //w36
-static Surfaces expand_merge_surfaces(Surfaces &                                  surfaces,
+ Surfaces expand_merge_surfaces(Surfaces &                                  surfaces,
                                       SurfaceType                                 surface_type,
                                       ExPolygons &                                shells,
                                       const Algorithm::RegionExpansionParameters &expansion_params_into_solid_infill,
                                       ExPolygons &                                sparse,
                                       const Algorithm::RegionExpansionParameters &expansion_params_into_sparse_infill,
                                       const float                                 closing_radius,
-                                      const double                                bridge_angle = -1.)
+                                      const double                                bridge_angle )
 {
     using namespace Slic3r::Algorithm;
 
diff --git a/src/libslic3r/LayerRegion.hpp b/src/libslic3r/LayerRegion.hpp
index a03c5b2..17ffb98 100644
--- a/src/libslic3r/LayerRegion.hpp
+++ b/src/libslic3r/LayerRegion.hpp
@@ -205,23 +205,44 @@ struct ExpansionZone {
 * detect bridges.
 * Trim "shells" by the expanded bridges.
 */
-Surfaces expand_bridges_detect_orientations(
+// w36
+/* Surfaces expand_bridges_detect_orientations(
     Surfaces &surfaces,
     std::vector<ExpansionZone>& expansion_zones,
     const float closing_radius
-);
+);*/
+
+//w36
+Surfaces expand_bridges_detect_orientations(Surfaces &                                  surfaces,
+                                            ExPolygons &                                shells,
+                                            const Algorithm::RegionExpansionParameters &expansion_params_into_solid_infill,
+                                            ExPolygons &                                sparse,
+                                            const Algorithm::RegionExpansionParameters &expansion_params_into_sparse_infill,
+                                            const float                                 closing_radius);
 
 /**
 * Extract bridging surfaces from "surfaces", expand them into "shells" using expansion_params.
 * Trim "shells" by the expanded bridges.
 */
-Surfaces expand_merge_surfaces(
+
+// w36
+/* Surfaces expand_merge_surfaces(
     Surfaces &surfaces,
     SurfaceType surface_type,
     std::vector<ExpansionZone>& expansion_zones,
     const float closing_radius,
     const double bridge_angle = -1
-);
+);*/
+
+// w36
+Surfaces expand_merge_surfaces(Surfaces &                                  surfaces,
+                               SurfaceType                                 surface_type,
+                               ExPolygons &                                shells,
+                               const Algorithm::RegionExpansionParameters &expansion_params_into_solid_infill,
+                               ExPolygons &                                sparse,
+                               const Algorithm::RegionExpansionParameters &expansion_params_into_sparse_infill,
+                               const float                                 closing_radius,
+                               const double                                bridge_angle = -1.);
 
 }
 
diff --git a/src/libslic3r/PrintObject.cpp b/src/libslic3r/PrintObject.cpp
index 48b2230..b1c4c7e 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -2370,11 +2370,17 @@ void PrintObject::bridge_over_infill()
                 Polygons lightning_area;
                 Polygons expansion_area;
                 Polygons total_fill_area;
+                //w35
+                Polygons top_area;
                 for (const LayerRegion *region : layer->regions()) {
                     Polygons internal_polys = to_polygons(region->fill_surfaces().filter_by_types({stInternal, stInternalSolid}));
                     expansion_area.insert(expansion_area.end(), internal_polys.begin(), internal_polys.end());
                     Polygons fill_polys = to_polygons(region->fill_expolygons());
                     total_fill_area.insert(total_fill_area.end(), fill_polys.begin(), fill_polys.end());
+                    //w35
+                    Polygons top_polys = to_polygons(region->fill_surfaces().filter_by_type(stTop));
+                    top_area.insert(top_area.end(), top_polys.begin(), top_polys.end());
+
                     if (region->region().config().fill_pattern == ipLightning) {
                         Polygons l = to_polygons(region->fill_surfaces().filter_by_type(stInternal));
                         lightning_area.insert(lightning_area.end(), l.begin(), l.end());
@@ -2453,12 +2459,21 @@ void PrintObject::bridge_over_infill()
                             bridging_area = construct_anchored_polygon(area_to_be_bridge, to_lines(boundary_plines), flow, bridging_angle);
                         }
                     }
-
-                    bridging_area          = opening(bridging_area, flow.scaled_spacing());
-                    bridging_area          = closing(bridging_area, flow.scaled_spacing());
-                    bridging_area          = intersection(bridging_area, limiting_area);
-                    bridging_area          = intersection(bridging_area, total_fill_area);
-                    expansion_area         = diff(expansion_area, bridging_area);
+                    //w35
+                    bridging_area = opening(bridging_area, flow.scaled_spacing());
+                    bridging_area = closing(bridging_area, flow.scaled_spacing());
+                    bridging_area = intersection(bridging_area, limiting_area);
+                    bridging_area = intersection(bridging_area, total_fill_area);
+                    bridging_area = diff(bridging_area, top_area);
+                    bridging_area  = opening(bridging_area, flow.scaled_spacing());
+                    bridging_area  = closing(bridging_area, flow.scaled_spacing());
+                    expansion_area = diff(expansion_area, bridging_area);
+                    
+                    //bridging_area          = opening(bridging_area, flow.scaled_spacing());
+                    //bridging_area          = closing(bridging_area, flow.scaled_spacing());
+                    //bridging_area          = intersection(bridging_area, limiting_area);
+                    //bridging_area          = intersection(bridging_area, total_fill_area);
+                    //expansion_area         = diff(expansion_area, bridging_area);
 
 #ifdef DEBUG_BRIDGE_OVER_INFILL
                     debug_draw(std::to_string(lidx) + "_" + std::to_string(cluster_idx) + "_" + std::to_string(job_idx) + "_" + "_expanded_bridging" +  std::to_string(r),
diff --git a/tests/libslic3r/test_layer_region.cpp b/tests/libslic3r/test_layer_region.cpp
index 0f6dfb7..02f7640 100644
--- a/tests/libslic3r/test_layer_region.cpp
+++ b/tests/libslic3r/test_layer_region.cpp
@@ -75,13 +75,26 @@ struct LayerRegionFixture {
 TEST_CASE_METHOD(LayerRegionFixture, "test the surface expansion", "[LayerRegion]") {
     const double custom_angle{1.234f};
 
-    const Surfaces result{expand_merge_surfaces(
+    // w36
+    /* const Surfaces result{expand_merge_surfaces(
         surfaces, stBottomBridge,
         expansion_zones,
         closing_radius,
         custom_angle
+    )};*/
+
+    // w36
+    const Surfaces result{expand_merge_surfaces(
+        surfaces, stBottomBridge,
+        shells,
+        expansion_params_into_solid_infill,
+        sparse,
+        expansion_params_into_sparse_infill,
+        closing_radius
     )};
 
+   
+
     if constexpr (export_svgs) {
         SVG svg("general_expansion.svg", BoundingBox{
             Point{scaled(-3.0), scaled(-1.0)},
@@ -112,9 +125,13 @@ TEST_CASE_METHOD(LayerRegionFixture, "test the surface expansion", "[LayerRegion
 }
 
 TEST_CASE_METHOD(LayerRegionFixture, "test the bridge expansion with the bridge angle detection", "[LayerRegion]") {
+    // w36
     Surfaces result{expand_bridges_detect_orientations(
         surfaces,
-        expansion_zones,
+        shells,
+        expansion_params_into_solid_infill,
+        sparse,
+        expansion_params_into_sparse_infill,
         closing_radius
     )};