diff --git a/src/libslic3r/Fill/FillFlippingLine.cpp b/src/libslic3r/Fill/FillFlippingLine.cpp
index fe6f56759d..4d16215c1e 100644
--- a/src/libslic3r/Fill/FillFlippingLine.cpp
+++ b/src/libslic3r/Fill/FillFlippingLine.cpp
@@ -196,7 +196,7 @@ void FillFlippingLine ::_fill_surface_single(
     coord_t line_spacing = coord_t(scale_(this->spacing) / params.density);
 
     // reduce density
-    if (params.density < 0.999) line_spacing *= 1.5;
+    if (params.density < 0.999) line_spacing *= 1.08;
 
     bb.merge(align_to_grid(bb.min, Point(line_spacing * 4, line_spacing * 4)));
 
diff --git a/src/libslic3r/PrintObject.cpp b/src/libslic3r/PrintObject.cpp
index c78e7de4b5..884b8b6e79 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -2333,9 +2333,17 @@ void PrintObject::bridge_over_infill()
     };
 
     // LAMBDA do determine optimal bridging angle
-    auto determine_bridging_angle = [](const Polygons &bridged_area, const Lines &anchors, InfillPattern dominant_pattern) {
+    auto determine_bridging_angle = [](const Polygons &bridged_area, const Lines &anchors, InfillPattern dominant_pattern, double infill_direction) {
         AABBTreeLines::LinesDistancer<Line> lines_tree(anchors);
 
+        // Check it the infill that require a fixed infill angle.
+        switch (dominant_pattern) {
+        case ip3DHoneycomb:
+        case ipFlippingLine:
+            return (infill_direction + 45.0) * 2.0 * M_PI / 360.;
+        default: break;
+        }
+
         std::map<double, int> counted_directions;
         for (const Polygon &p : bridged_area) {
             double acc_distance = 0;