From baee1671efea64be615988e9958b8d4ce3077eef Mon Sep 17 00:00:00 2001
From: Vojtech Bubnik <bubnikv@gmail.com>
Date: Fri, 10 Dec 2021 16:41:30 +0100
Subject: [PATCH] Fix of Bug in First Layer Expansion: Support material base
 layer intersects/overlaps with interface layer First layer support expansion
 was only trimmed with contacts, not with support interface layes (dense
 supports supporting contact layers).

---
 src/libslic3r/SupportMaterial.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/libslic3r/SupportMaterial.cpp b/src/libslic3r/SupportMaterial.cpp
index 647d4bce80..8a04b64396 100644
--- a/src/libslic3r/SupportMaterial.cpp
+++ b/src/libslic3r/SupportMaterial.cpp
@@ -3044,7 +3044,7 @@ PrintObjectSupportMaterial::MyLayersPtr PrintObjectSupportMaterial::generate_raf
                     raft = diff(expand(raft, step), trimming);
             } else
                 raft = diff(raft, trimming);
-            if (contacts != nullptr)
+            if (! interface_polygons.empty())
                 columns_base->polygons = diff(columns_base->polygons, interface_polygons);
         }
         if (! brim.empty()) {