diff --git a/src/libslic3r/Fill/Fill3DHoneycomb.cpp b/src/libslic3r/Fill/Fill3DHoneycomb.cpp
index 4fcb1ed05..7061dc19b 100644
--- a/src/libslic3r/Fill/Fill3DHoneycomb.cpp
+++ b/src/libslic3r/Fill/Fill3DHoneycomb.cpp
@@ -196,7 +196,7 @@ void Fill3DHoneycomb::_fill_surface_single(
 {
     // no rotation is supported for this infill pattern
     // BBL: add support for rotation 
-    auto infill_angle   = float(this->angle);
+    auto infill_angle = float(this->angle);
     if (std::abs(infill_angle) >= EPSILON) expolygon.rotate(-infill_angle);
     BoundingBox bb = expolygon.contour.bounding_box();
 
diff --git a/src/libslic3r/Fill/FillFlippingLine.cpp b/src/libslic3r/Fill/FillFlippingLine.cpp
index fe6f56759..4d16215c1 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 aa99d3a0c..6487524cd 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -2211,9 +2211,17 @@ 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;
@@ -2587,11 +2595,12 @@ void PrintObject::bridge_over_infill()
                             double bridging_angle = 0;
                             if (!anchors.empty()) {
                                 bridging_angle = determine_bridging_angle(area_to_be_bridge, to_lines(anchors),
-                                    candidate.region->region().config().sparse_infill_pattern.value);
+                                                                            candidate.region->region().config().sparse_infill_pattern.value,
+                                                                            candidate.region->region().config().infill_direction.value);
                             } else {
                                 // use expansion boundaries as anchors.
                                 // Also, use Infill pattern that is neutral for angle determination, since there are no infill lines.
-                                bridging_angle = determine_bridging_angle(area_to_be_bridge, to_lines(boundary_plines), InfillPattern::ipLine);
+                                bridging_angle = determine_bridging_angle(area_to_be_bridge, to_lines(boundary_plines), InfillPattern::ipLine, 0);
                             }
 
                             boundary_plines.insert(boundary_plines.end(), anchors.begin(), anchors.end());