diff --git a/src/libslic3r/Point.hpp b/src/libslic3r/Point.hpp
index d456fb9c6..a03e6f436 100644
--- a/src/libslic3r/Point.hpp
+++ b/src/libslic3r/Point.hpp
@@ -22,6 +22,7 @@ typedef Point Vector;
 // Vector types with a fixed point coordinate base type.
 typedef Eigen::Matrix<coord_t,  2, 1, Eigen::DontAlign> Vec2crd;
 typedef Eigen::Matrix<coord_t,  3, 1, Eigen::DontAlign> Vec3crd;
+typedef Eigen::Matrix<int,      2, 1, Eigen::DontAlign> Vec2i;
 typedef Eigen::Matrix<int,      3, 1, Eigen::DontAlign> Vec3i;
 typedef Eigen::Matrix<int64_t,  2, 1, Eigen::DontAlign> Vec2i64;
 typedef Eigen::Matrix<int64_t,  3, 1, Eigen::DontAlign> Vec3i64;
diff --git a/src/libslic3r/Tesselate.cpp b/src/libslic3r/Tesselate.cpp
index f4ce0703d..febb3d0e7 100644
--- a/src/libslic3r/Tesselate.cpp
+++ b/src/libslic3r/Tesselate.cpp
@@ -20,7 +20,7 @@ public:
         gluDeleteTess(m_tesselator);
     }
 
-    Pointf3s tesselate(const ExPolygon &expoly, double z_, bool flipped_)
+    std::vector<Vec3d> tesselate3d(const ExPolygon &expoly, double z_, bool flipped_)
     {
         m_z = z_;
         m_flipped = flipped_;
@@ -56,7 +56,7 @@ public:
         return std::move(m_output_triangles);
     }
 
-    Pointf3s tesselate(const ExPolygons &expolygons, double z_, bool flipped_)
+    std::vector<Vec3d> tesselate3d(const ExPolygons &expolygons, double z_, bool flipped_)
     {
         m_z = z_;
         m_flipped = flipped_;
@@ -189,16 +189,60 @@ private:
     bool            m_flipped;
 };
 
-Pointf3s triangulate_expolygons_3df(const ExPolygon &poly, coordf_t z, bool flip)
+std::vector<Vec3d> triangulate_expolygon_3d(const ExPolygon &poly, coordf_t z, bool flip)
 {
     GluTessWrapper tess;
-    return tess.tesselate(poly, z, flip);
+    return tess.tesselate3d(poly, z, flip);
 }
 
-Pointf3s triangulate_expolygons_3df(const ExPolygons &polys, coordf_t z, bool flip)
+std::vector<Vec3d> triangulate_expolygons_3d(const ExPolygons &polys, coordf_t z, bool flip)
 {
 	GluTessWrapper tess;
-    return tess.tesselate(polys, z, flip);
+    return tess.tesselate3d(polys, z, flip);
+}
+
+std::vector<Vec2d> triangulate_expolygon_2d(const ExPolygon &poly, bool flip)
+{
+    GluTessWrapper tess;
+    std::vector<Vec3d> triangles = tess.tesselate3d(poly, 0, flip);
+    std::vector<Vec2d> out;
+    out.reserve(triangles.size());
+    for (const Vec3d &pt : triangles)
+        out.emplace_back(pt.x(), pt.y());
+    return out;
+}
+
+std::vector<Vec2d> triangulate_expolygons_2d(const ExPolygons &polys, bool flip)
+{
+    GluTessWrapper tess;
+    std::vector<Vec3d> triangles = tess.tesselate3d(polys, 0, flip);
+    std::vector<Vec2d> out;
+    out.reserve(triangles.size());
+    for (const Vec3d &pt : triangles)
+        out.emplace_back(pt.x(), pt.y());
+    return out;
+}
+
+std::vector<Vec2f> triangulate_expolygon_2f(const ExPolygon &poly, bool flip)
+{
+    GluTessWrapper tess;
+    std::vector<Vec3d> triangles = tess.tesselate3d(poly, 0, flip);
+    std::vector<Vec2f> out;
+    out.reserve(triangles.size());
+    for (const Vec3d &pt : triangles)
+        out.emplace_back(float(pt.x()), float(pt.y()));
+    return out;
+}
+
+std::vector<Vec2f> triangulate_expolygons_2f(const ExPolygons &polys, bool flip)
+{
+    GluTessWrapper tess;
+    std::vector<Vec3d> triangles = tess.tesselate3d(polys, 0, flip);
+    std::vector<Vec2f> out;
+    out.reserve(triangles.size());
+    for (const Vec3d &pt : triangles)
+        out.emplace_back(float(pt.x()), float(pt.y()));
+    return out;
 }
 
 } // namespace Slic3r
diff --git a/src/libslic3r/Tesselate.hpp b/src/libslic3r/Tesselate.hpp
index ed12df888..02e86eb33 100644
--- a/src/libslic3r/Tesselate.hpp
+++ b/src/libslic3r/Tesselate.hpp
@@ -10,8 +10,12 @@ namespace Slic3r {
 class ExPolygon;
 typedef std::vector<ExPolygon> ExPolygons;
 
-extern Pointf3s triangulate_expolygons_3df(const ExPolygon &poly, coordf_t z = 0, bool flip = false);
-extern Pointf3s triangulate_expolygons_3df(const ExPolygons &polys, coordf_t z = 0, bool flip = false);
+extern std::vector<Vec3d> triangulate_expolygon_3d (const ExPolygon  &poly,  coordf_t z = 0, bool flip = false);
+extern std::vector<Vec3d> triangulate_expolygons_3d(const ExPolygons &polys, coordf_t z = 0, bool flip = false);
+extern std::vector<Vec2d> triangulate_expolygon_2d (const ExPolygon  &poly,  bool flip = false);
+extern std::vector<Vec2d> triangulate_expolygons_2d(const ExPolygons &polys, bool flip = false);
+extern std::vector<Vec2f> triangulate_expolygon_2f (const ExPolygon  &poly,  bool flip = false);
+extern std::vector<Vec2f> triangulate_expolygons_2f(const ExPolygons &polys, bool flip = false);
 
 } // namespace Slic3r
 
diff --git a/src/libslic3r/TriangleMesh.cpp b/src/libslic3r/TriangleMesh.cpp
index b93ce12b5..0784b44f2 100644
--- a/src/libslic3r/TriangleMesh.cpp
+++ b/src/libslic3r/TriangleMesh.cpp
@@ -1781,7 +1781,7 @@ void TriangleMeshSlicer::cut(float z, TriangleMesh* upper, TriangleMesh* lower)
         BOOST_LOG_TRIVIAL(trace) << "TriangleMeshSlicer::cut - triangulating upper part";
         ExPolygons section;
         this->make_expolygons_simple(upper_lines, &section);
-        Pointf3s triangles = triangulate_expolygons_3df(section, z, true);
+        Pointf3s triangles = triangulate_expolygons_3d(section, z, true);
         stl_facet facet;
         facet.normal = stl_normal(0, 0, -1.f);
         for (size_t i = 0; i < triangles.size(); ) {
@@ -1795,7 +1795,7 @@ void TriangleMeshSlicer::cut(float z, TriangleMesh* upper, TriangleMesh* lower)
         BOOST_LOG_TRIVIAL(trace) << "TriangleMeshSlicer::cut - triangulating lower part";
         ExPolygons section;
         this->make_expolygons_simple(lower_lines, &section);
-        Pointf3s triangles = triangulate_expolygons_3df(section, z, false);
+        Pointf3s triangles = triangulate_expolygons_3d(section, z, false);
         stl_facet facet;
         facet.normal = stl_normal(0, 0, -1.f);
         for (size_t i = 0; i < triangles.size(); ) {
diff --git a/src/slic3r/GUI/GLCanvas3D.cpp b/src/slic3r/GUI/GLCanvas3D.cpp
index 76c0337d1..63dcd950b 100644
--- a/src/slic3r/GUI/GLCanvas3D.cpp
+++ b/src/slic3r/GUI/GLCanvas3D.cpp
@@ -6833,20 +6833,20 @@ void GLCanvas3D::_render_sla_slices() const
             {
                 // calculate model bottom cap
                 if (bottom_obj_triangles.empty() && (it_min_z->second.model_slices_idx < model_slices.size()))
-                    bottom_obj_triangles = triangulate_expolygons_3df(model_slices[it_min_z->second.model_slices_idx], min_z, true);
+                    bottom_obj_triangles = triangulate_expolygons_3d(model_slices[it_min_z->second.model_slices_idx], min_z, true);
                 // calculate support bottom cap
                 if (bottom_sup_triangles.empty() && (it_min_z->second.support_slices_idx < support_slices.size()))
-                    bottom_sup_triangles = triangulate_expolygons_3df(support_slices[it_min_z->second.support_slices_idx], min_z, true);
+                    bottom_sup_triangles = triangulate_expolygons_3d(support_slices[it_min_z->second.support_slices_idx], min_z, true);
             }
 
             if (it_max_z != index.end())
             {
                 // calculate model top cap
                 if (top_obj_triangles.empty() && (it_max_z->second.model_slices_idx < model_slices.size()))
-                    top_obj_triangles = triangulate_expolygons_3df(model_slices[it_max_z->second.model_slices_idx], max_z, false);
+                    top_obj_triangles = triangulate_expolygons_3d(model_slices[it_max_z->second.model_slices_idx], max_z, false);
                 // calculate support top cap
                 if (top_sup_triangles.empty() && (it_max_z->second.support_slices_idx < support_slices.size()))
-					top_sup_triangles = triangulate_expolygons_3df(support_slices[it_max_z->second.support_slices_idx], max_z, false);
+					top_sup_triangles = triangulate_expolygons_3d(support_slices[it_max_z->second.support_slices_idx], max_z, false);
             }
         }