From f27605eac166d36b79f4db8890cd38f19adc1fc2 Mon Sep 17 00:00:00 2001
From: Rodrigo Faselli <162915171+RF47@users.noreply.github.com>
Date: Tue, 27 Jan 2026 19:12:18 -0300
Subject: [PATCH] 3d honeycomb bug fix (with infill combination) improve bridge
 direction (#12062)

* fill 3d honeycomb bugfix

* fix bridges

Co-Authored-By: tome9111991 <57866234+tome9111991@users.noreply.github.com>

* Fix typo

* cleaning

* Remove bridging angle adjustment for ip3DHoneycomb

* Adjust layer height scaling for infill consistency

* PR comments

---------

Co-authored-by: tome9111991 <57866234+tome9111991@users.noreply.github.com>
---
 src/libslic3r/Fill/Fill3DHoneycomb.cpp |  6 ++++--
 src/libslic3r/PrintObject.cpp          | 15 +++++++++------
 2 files changed, 13 insertions(+), 8 deletions(-)

diff --git a/src/libslic3r/Fill/Fill3DHoneycomb.cpp b/src/libslic3r/Fill/Fill3DHoneycomb.cpp
index de4aaeacd3..6429a81073 100644
--- a/src/libslic3r/Fill/Fill3DHoneycomb.cpp
+++ b/src/libslic3r/Fill/Fill3DHoneycomb.cpp
@@ -224,7 +224,9 @@ void Fill3DHoneycomb::_fill_surface_single(
     // This means that the resultant infill won't be an ideal truncated octahedron,
     // but it should look better than the equivalent quantised version
 
-    coordf_t layerHeight = scale_(thickness_layers);
+    //Orca: uses a fixed layer height to avoid inconsistent bridges and variable layer height artifacts.
+    //coordf_t layerHeight = scale_(thickness_layers);
+    coordf_t layerHeight = scale_(1.0);
     // ceiling to an integer value of layers per Z
     // (with a little nudge in case it's close to perfect)
     coordf_t layersPerModule = floor((gridSize * 2) / (zScale * layerHeight) + 0.05);
@@ -300,4 +302,4 @@ void Fill3DHoneycomb::_fill_surface_single(
     }
 }
 
-} // namespace Slic3r
\ No newline at end of file
+} // namespace Slic3r
diff --git a/src/libslic3r/PrintObject.cpp b/src/libslic3r/PrintObject.cpp
index 4b4237dca1..fc68fce76b 100644
--- a/src/libslic3r/PrintObject.cpp
+++ b/src/libslic3r/PrintObject.cpp
@@ -2615,13 +2615,16 @@ void PrintObject::bridge_over_infill()
     auto determine_bridging_angle = [](const Polygons &bridged_area, const Lines &anchors, InfillPattern dominant_pattern, double infill_direction) {
         AABBTreeLines::LinesDistancer<Line> lines_tree(anchors);
 
+        // Orca: since 3D Honeycomb was "fixed" by forcing coordf_t layerHeight = scale_(1.0), this is no longer needed.
+        // CorssHatch also does not need fixed angle.
+        //
         // Check it the infill that require a fixed infill angle.
-        switch (dominant_pattern) {
-        case ip3DHoneycomb:
-        case ipCrossHatch:
-            return (infill_direction + 45.0) * 2.0 * M_PI / 360.;
-        default: break;
-        }
+        //switch (dominant_pattern) {
+        //case ip3DHoneycomb:
+        //case ipCrossHatch:
+        //    return (infill_direction + 45.0) * 2.0 * M_PI / 360.;
+        //default: break;
+        //}
 
         std::map<double, int> counted_directions;
         for (const Polygon &p : bridged_area) {