diff --git a/src/ifcconvert/IfcConvert.cpp b/src/ifcconvert/IfcConvert.cpp
index afe407df8f..6155bc4c43 100644
--- a/src/ifcconvert/IfcConvert.cpp
+++ b/src/ifcconvert/IfcConvert.cpp
@@ -843,7 +843,7 @@ int main(int argc, char** argv) {
     if (is_tesselated && (center_model || center_model_geometry)) {
 		std::vector<double> offset(3);
 
-		ifcopenshell::geom::iterator tmp_context_iterator(ifcopenshell::geom::kernels::construct(ifc_file, geometry_kernel, settings), settings, ifc_file, filter_funcs, num_threads, logger);
+		ifcopenshell::geom::iterator tmp_context_iterator(ifcopenshell::geom::kernels::construct(ifc_file, geometry_kernel, settings, logger), settings, ifc_file, filter_funcs, num_threads, logger);
 			
 		time_t bounds_start, bounds_end;
 		time(&bounds_start);
@@ -888,7 +888,7 @@ int main(int argc, char** argv) {
 	}
 
 	std::unique_ptr<ifcopenshell::geom::iterator> context_iterator;
-	context_iterator.reset(new ifcopenshell::geom::iterator(ifcopenshell::geom::kernels::construct(ifc_file, geometry_kernel, settings), settings, ifc_file, filter_funcs, num_threads, logger));
+	context_iterator.reset(new ifcopenshell::geom::iterator(ifcopenshell::geom::kernels::construct(ifc_file, geometry_kernel, settings, logger), settings, ifc_file, filter_funcs, num_threads, logger));
 
 	logger.message(ifcopenshell::logger::LOG_PERF, "file geometry conversion");
 
@@ -1370,7 +1370,7 @@ void fix_quantities(ifcopenshell::file& f, bool no_progress, bool quiet, bool st
 	settings.get<ifcopenshell::geom::settings::ConvertBackUnits>().value = true;
 	settings.get<ifcopenshell::geom::settings::IteratorOutput>().value = ifcopenshell::geom::settings::NATIVE;
 
-	ifcopenshell::geom::iterator context_iterator(ifcopenshell::geom::kernels::construct(&f, "opencascade", settings), settings, &f, {}, 1, logger);
+	ifcopenshell::geom::iterator context_iterator(ifcopenshell::geom::kernels::construct(&f, "opencascade", settings, logger), settings, &f, {}, 1, logger);
 
 	if (!context_iterator.initialize()) {
 		return;
diff --git a/src/ifcconvert/validate_space_boundaries.cpp b/src/ifcconvert/validate_space_boundaries.cpp
index c90eeeee1b..4266f48332 100644
--- a/src/ifcconvert/validate_space_boundaries.cpp
+++ b/src/ifcconvert/validate_space_boundaries.cpp
@@ -54,7 +54,7 @@ void fix_spaceboundaries(ifcopenshell::file& f, bool no_progress, bool quiet, bo
 	settings.get<ifcopenshell::geom::settings::IteratorOutput>().value = ifcopenshell::geom::settings::NATIVE;
 	settings.get<ifcopenshell::geom::settings::DisableOpeningSubtractions>().value = true;
 
-	ifcopenshell::geom::converter c(ifcopenshell::geom::kernels::construct(&f2, "cgal", settings), &f2, settings, logger);
+	ifcopenshell::geom::converter c(ifcopenshell::geom::kernels::construct(&f2, "cgal", settings, logger), &f2, settings, logger);
 
 	std::map<std::set<std::string>, std::vector<Kernel_::Point_3>> elem_to_space_boundary_coords;
 
diff --git a/src/ifcconvert/validate_storey_containment.cpp b/src/ifcconvert/validate_storey_containment.cpp
index a445b06d40..f4bf0781c1 100644
--- a/src/ifcconvert/validate_storey_containment.cpp
+++ b/src/ifcconvert/validate_storey_containment.cpp
@@ -23,7 +23,7 @@ void fix_storeycontainment(ifcopenshell::file& f, bool no_progress, bool quiet,
 		ifcopenshell::geom::entity_filter(false, false, {"IfcOpeningElement", "IfcSpace"})
 	};
 
-	ifcopenshell::geom::iterator context_iterator(ifcopenshell::geom::kernels::construct(&f, "cgal", settings), settings, &f, no_openings_and_spaces, 1, logger);
+	ifcopenshell::geom::iterator context_iterator(ifcopenshell::geom::kernels::construct(&f, "cgal", settings, logger), settings, &f, no_openings_and_spaces, 1, logger);
 
 	auto get_elevation = [](const ifcopenshell::IfcBaseClass* a) {
 		return ((const ifcopenshell::IfcBaseEntity*)a)->get_value<double>("Elevation", 0.);
diff --git a/src/ifcconvert/validate_wall_connectivity.cpp b/src/ifcconvert/validate_wall_connectivity.cpp
index 7c44821f84..8777349934 100644
--- a/src/ifcconvert/validate_wall_connectivity.cpp
+++ b/src/ifcconvert/validate_wall_connectivity.cpp
@@ -23,7 +23,7 @@ void fix_wallconnectivity(ifcopenshell::file& f, bool no_progress, bool quiet, b
 
 	settings.get<ifcopenshell::geom::settings::OutputDimensionality>().value = ifcopenshell::geom::settings::CURVES;
 	
-	ifcopenshell::geom::converter c(ifcopenshell::geom::kernels::construct(&f, "cgal", settings), &f, settings, logger);
+	ifcopenshell::geom::converter c(ifcopenshell::geom::kernels::construct(&f, "cgal", settings, logger), &f, settings, logger);
 
 	auto rels = f.instances_by_type("IfcRelConnectsPathElements");
 	std::map<std::set<const ifcopenshell::IfcBaseClass*>, const ifcopenshell::IfcBaseClass*> rel_by_elem;
diff --git a/src/ifcconvert/validation_utils.h b/src/ifcconvert/validation_utils.h
index 4f99e6cb20..caa5dccfa9 100644
--- a/src/ifcconvert/validation_utils.h
+++ b/src/ifcconvert/validation_utils.h
@@ -460,7 +460,7 @@ struct intersection_validator {
 			ifcopenshell::geom::entity_filter(true, false, entities)
 		};
 
-		ifcopenshell::geom::iterator context_iterator(ifcopenshell::geom::kernels::construct(&f, "cgal", settings), settings, &f, spaces_and_walls, 1, logger);
+		ifcopenshell::geom::iterator context_iterator(ifcopenshell::geom::kernels::construct(&f, "cgal", settings, logger), settings, &f, spaces_and_walls, 1, logger);
 
 		if (!context_iterator.initialize()) {
 			return;
diff --git a/src/ifcgeom/kernel_registry.cpp b/src/ifcgeom/kernel_registry.cpp
index ec35a9d5ae..d2657ca8e7 100644
--- a/src/ifcgeom/kernel_registry.cpp
+++ b/src/ifcgeom/kernel_registry.cpp
@@ -124,12 +124,12 @@ bool ifcopenshell::geom::kernels::kernel_registry::has(const std::string& backen
 	return entries_.find(kernel_key(backend_id)) != entries_.end();
 }
 
-std::unique_ptr<ifcopenshell::geom::kernels::abstract_kernel> ifcopenshell::geom::kernels::kernel_registry::create(const std::string& backend_id, ifcopenshell::file* file, ifcopenshell::geom::settings& settings) const {
+std::unique_ptr<ifcopenshell::geom::kernels::abstract_kernel> ifcopenshell::geom::kernels::kernel_registry::create(const std::string& backend_id, ifcopenshell::file* file, ifcopenshell::geom::settings& settings, ifcopenshell::logger& logger) const {
 	const auto iter = entries_.find(kernel_key(backend_id));
 	if (iter == entries_.end()) {
 		throw ifcopenshell::exception("No geometry kernel registered for " + backend_id);
 	}
-	return std::unique_ptr<abstract_kernel>(iter->second.create_(file, settings));
+	return std::unique_ptr<abstract_kernel>(iter->second.create_(file, settings, logger));
 }
 
 std::vector<ifcopenshell::geom::kernels::kernel_info> ifcopenshell::geom::kernels::kernel_registry::kernels() const {
@@ -145,7 +145,7 @@ ifcopenshell::geom::kernels::kernel_registry& ifcopenshell::geom::kernels::kerne
 	return registry;
 }
 
-std::unique_ptr<ifcopenshell::geom::kernels::abstract_kernel> ifcopenshell::geom::kernels::construct(ifcopenshell::file* file, const std::string& geometry_library, ifcopenshell::geom::settings& settings) {
+std::unique_ptr<ifcopenshell::geom::kernels::abstract_kernel> ifcopenshell::geom::kernels::construct(ifcopenshell::file* file, const std::string& geometry_library, ifcopenshell::geom::settings& settings, ifcopenshell::logger& logger) {
 	auto geometry_library_lower = boost::to_lower_copy(geometry_library);
 	auto& registry = kernel_registry_instance();
 
@@ -153,7 +153,7 @@ std::unique_ptr<ifcopenshell::geom::kernels::abstract_kernel> ifcopenshell::geom
 		load_kernel_plugin(registry, geometry_library_lower);
 	}
 	if (registry.has(geometry_library_lower)) {
-		return registry.create(geometry_library_lower, file, settings);
+		return registry.create(geometry_library_lower, file, settings, logger);
 	}
 
 	if (geometry_library_lower.rfind("hybrid-", 0) == 0) {
@@ -173,7 +173,7 @@ std::unique_ptr<ifcopenshell::geom::kernels::abstract_kernel> ifcopenshell::geom
 				throw ifcopenshell::exception("Invalid hybrid kernel; no match for prefix of " + geometry_library_lower);
 			}
 
-			kernels.push_back(registry.create(matched_backend_id, file, settings));
+			kernels.push_back(registry.create(matched_backend_id, file, settings, logger));
 			geometry_library_lower = geometry_library_lower.substr(matched_backend_id.size());
 		}
 
@@ -183,7 +183,7 @@ std::unique_ptr<ifcopenshell::geom::kernels::abstract_kernel> ifcopenshell::geom
 		}
 
 		if (!kernels.empty()) {
-			return std::make_unique<hybrid_kernel>(geometry_library, file, settings, std::move(kernels));
+			return std::make_unique<hybrid_kernel>(geometry_library, file, settings, std::move(kernels), logger);
 		}
 	}
 
diff --git a/src/ifcgeom/kernel_registry.h b/src/ifcgeom/kernel_registry.h
index 71d37123eb..be0fdba888 100644
--- a/src/ifcgeom/kernel_registry.h
+++ b/src/ifcgeom/kernel_registry.h
@@ -42,11 +42,11 @@ namespace ifcopenshell {
 
 			class IFC_GEOM_API kernel_registry {
 			public:
-				typedef std::function<abstract_kernel*(ifcopenshell::file*, ifcopenshell::geom::settings&)> create_fn;
+				typedef std::function<abstract_kernel*(ifcopenshell::file*, ifcopenshell::geom::settings&, ifcopenshell::logger&)> create_fn;
 
 				void bind(const kernel_info& info, create_fn create, const ifcopenshell::plugin::module& module = ifcopenshell::plugin::module());
 				bool has(const std::string& backend_id) const;
-				std::unique_ptr<abstract_kernel> create(const std::string& backend_id, ifcopenshell::file* file, ifcopenshell::geom::settings& settings) const;
+				std::unique_ptr<abstract_kernel> create(const std::string& backend_id, ifcopenshell::file* file, ifcopenshell::geom::settings& settings, ifcopenshell::logger& logger) const;
 				std::vector<kernel_info> kernels() const;
 
 			private:
@@ -60,7 +60,7 @@ namespace ifcopenshell {
 			};
 
 			IFC_GEOM_API kernel_registry& kernel_registry_instance();
-			IFC_GEOM_API std::unique_ptr<abstract_kernel> construct(ifcopenshell::file* file, const std::string& geometry_library, ifcopenshell::geom::settings& settings);
+			IFC_GEOM_API std::unique_ptr<abstract_kernel> construct(ifcopenshell::file* file, const std::string& geometry_library, ifcopenshell::geom::settings& settings, ifcopenshell::logger& logger = ifcopenshell::logger::root());
 
 		}
 	}
diff --git a/src/ifcgeom/kernels/cgal/plugin.cpp b/src/ifcgeom/kernels/cgal/plugin.cpp
index b1a0273ddb..032c3e9fe8 100644
--- a/src/ifcgeom/kernels/cgal/plugin.cpp
+++ b/src/ifcgeom/kernels/cgal/plugin.cpp
@@ -51,8 +51,8 @@ namespace ifcopenshell {
 					return kernel_plugin_metadata(plugin_name);
 				}
 
-				abstract_kernel* create_kernel(ifcopenshell::file*, ifcopenshell::geom::settings& settings) {
-					return new kernel_type(settings);
+				abstract_kernel* create_kernel(ifcopenshell::file*, ifcopenshell::geom::settings& settings, ifcopenshell::logger& logger) {
+					return new kernel_type(settings, logger);
 				}
 
 				void register_plugin(kernel_registry& registry, const plugin::module& module) {
diff --git a/src/ifcgeom/kernels/manifold/plugin.cpp b/src/ifcgeom/kernels/manifold/plugin.cpp
index 9bda410341..42217926d4 100644
--- a/src/ifcgeom/kernels/manifold/plugin.cpp
+++ b/src/ifcgeom/kernels/manifold/plugin.cpp
@@ -35,8 +35,8 @@ namespace ifcopenshell {
 					return kernel_plugin_metadata("manifold");
 				}
 
-				abstract_kernel* create_kernel(ifcopenshell::file*, ifcopenshell::geom::settings& settings) {
-					return new manifold_kernel(settings);
+				abstract_kernel* create_kernel(ifcopenshell::file*, ifcopenshell::geom::settings& settings, ifcopenshell::logger& logger) {
+					return new manifold_kernel(settings, logger);
 				}
 
 				void register_plugin(kernel_registry& registry, const plugin::module& module) {
diff --git a/src/ifcgeom/kernels/opencascade/plugin.cpp b/src/ifcgeom/kernels/opencascade/plugin.cpp
index 903a225482..d745f52fe3 100644
--- a/src/ifcgeom/kernels/opencascade/plugin.cpp
+++ b/src/ifcgeom/kernels/opencascade/plugin.cpp
@@ -35,8 +35,8 @@ namespace ifcopenshell {
 					return kernel_plugin_metadata("opencascade");
 				}
 
-				abstract_kernel* create_kernel(ifcopenshell::file*, ifcopenshell::geom::settings& settings) {
-					return new ifcopenshell::geom::open_cascade_kernel(settings);
+				abstract_kernel* create_kernel(ifcopenshell::file*, ifcopenshell::geom::settings& settings, ifcopenshell::logger& logger) {
+					return new ifcopenshell::geom::open_cascade_kernel(settings, logger);
 				}
 
 				void register_plugin(kernel_registry& registry, const plugin::module& module) {
diff --git a/src/ifcgeom/kernels/passthrough/plugin.cpp b/src/ifcgeom/kernels/passthrough/plugin.cpp
index 17e08ac4bf..7c5046e4c6 100644
--- a/src/ifcgeom/kernels/passthrough/plugin.cpp
+++ b/src/ifcgeom/kernels/passthrough/plugin.cpp
@@ -35,8 +35,8 @@ namespace ifcopenshell {
 					return kernel_plugin_metadata("passthrough");
 				}
 
-				abstract_kernel* create_kernel(ifcopenshell::file*, ifcopenshell::geom::settings& settings) {
-					return new passthrough_kernel(settings);
+				abstract_kernel* create_kernel(ifcopenshell::file*, ifcopenshell::geom::settings& settings, ifcopenshell::logger& logger) {
+					return new passthrough_kernel(settings, logger);
 				}
 
 				void register_plugin(kernel_registry& registry, const plugin::module& module) {
diff --git a/src/ifcgeom/tests/test_ifcopenshell_geometry.cpp b/src/ifcgeom/tests/test_ifcopenshell_geometry.cpp
index 272f9a839c..63f20538dc 100644
--- a/src/ifcgeom/tests/test_ifcopenshell_geometry.cpp
+++ b/src/ifcgeom/tests/test_ifcopenshell_geometry.cpp
@@ -63,7 +63,7 @@ std::size_t count_geo403_for_wall(hierarchy_helper<IfcSchema>& file, const IfcSc
     ifcopenshell::logger log;
     log.output_format(ifcopenshell::logger::FMT_INMEMORY);
     ifcopenshell::geom::converter converter(
-        ifcopenshell::geom::kernels::construct(&file, "opencascade", settings), &file, settings, log);
+        ifcopenshell::geom::kernels::construct(&file, "opencascade", settings, log), &file, settings, log);
     delete converter.create_brep_for_representation_and_product(wall.Representation().Representations().back(), wall);
     return log.count("GEO403");
 }
@@ -94,7 +94,7 @@ IfcSchema::IfcRepresentation select_representation(
     ifcopenshell::logger log;
     log.output_format(ifcopenshell::logger::FMT_INMEMORY);
     ifcopenshell::geom::converter converter(
-        ifcopenshell::geom::kernels::construct(&file, "passthrough", settings), &file, settings, log);
+        ifcopenshell::geom::kernels::construct(&file, "passthrough", settings, log), &file, settings, log);
 
     auto selected = converter.mapping()->representation_of(wall).as<IfcSchema::IfcRepresentation>();
     REQUIRE(selected);
@@ -126,7 +126,7 @@ std::vector<ifcopenshell::geom::geometry_conversion_task> representation_tasks(
     ifcopenshell::logger log;
     log.output_format(ifcopenshell::logger::FMT_INMEMORY);
     ifcopenshell::geom::converter converter(
-        ifcopenshell::geom::kernels::construct(&file, "passthrough", settings), &file, settings, log);
+        ifcopenshell::geom::kernels::construct(&file, "passthrough", settings, log), &file, settings, log);
 
     std::vector<ifcopenshell::geom::geometry_conversion_task> tasks;
     std::vector<ifcopenshell::geom::filter_function> filters;
diff --git a/src/ifcwrap/IfcGeomWrapper.i b/src/ifcwrap/IfcGeomWrapper.i
index 9322d7340a..04235b6093 100644
--- a/src/ifcwrap/IfcGeomWrapper.i
+++ b/src/ifcwrap/IfcGeomWrapper.i
@@ -761,14 +761,14 @@ struct shape_rtti : public boost::static_visitor<PyObject*>
 	// anyway it does not matter as SWIG generates C code without actual constructors
 	ifcopenshell::geom::iterator* construct_iterator(const std::string& geometry_library, ifcopenshell::geom::settings settings, ifcopenshell::file* file, int num_threads, ifcopenshell::logger* logger = nullptr) {
 		ifcopenshell::logger& logger_ = ifcopenshell::logger_or_root(logger);
-		return new ifcopenshell::geom::iterator(ifcopenshell::geom::kernels::construct(file, geometry_library, settings), settings, file, num_threads, logger_);
+		return new ifcopenshell::geom::iterator(ifcopenshell::geom::kernels::construct(file, geometry_library, settings, logger_), settings, file, num_threads, logger_);
 	}
 
 	ifcopenshell::geom::iterator* construct_iterator_with_include_exclude(const std::string& geometry_library, ifcopenshell::geom::settings settings, ifcopenshell::file* file, std::vector<std::string> elems, bool include, int num_threads, ifcopenshell::logger* logger = nullptr) {
 		ifcopenshell::logger& logger_ = ifcopenshell::logger_or_root(logger);
 		std::set<std::string> elems_set(elems.begin(), elems.end());
 		ifcopenshell::geom::entity_filter ef{ include, false, elems_set };
-		return new ifcopenshell::geom::iterator(ifcopenshell::geom::kernels::construct(file, geometry_library, settings), settings, file, {ef}, num_threads, logger_);
+		return new ifcopenshell::geom::iterator(ifcopenshell::geom::kernels::construct(file, geometry_library, settings, logger_), settings, file, {ef}, num_threads, logger_);
 	}
 
 	ifcopenshell::geom::iterator* construct_iterator_with_include_exclude_globalid(const std::string& geometry_library, ifcopenshell::geom::settings settings, ifcopenshell::file* file, std::vector<std::string> elems, bool include, int num_threads, ifcopenshell::logger* logger = nullptr) {
@@ -778,14 +778,14 @@ struct shape_rtti : public boost::static_visitor<PyObject*>
 		af.attribute_name = "GlobalId";
 		af.populate(elems_set);
 		af.include = include;
-		return new ifcopenshell::geom::iterator(ifcopenshell::geom::kernels::construct(file, geometry_library, settings), settings, file, {af}, num_threads, logger_);
+		return new ifcopenshell::geom::iterator(ifcopenshell::geom::kernels::construct(file, geometry_library, settings, logger_), settings, file, {af}, num_threads, logger_);
 	}
 
 	ifcopenshell::geom::iterator* construct_iterator_with_include_exclude_id(const std::string& geometry_library, ifcopenshell::geom::settings settings, ifcopenshell::file* file, std::vector<int> elems, bool include, int num_threads, ifcopenshell::logger* logger = nullptr) {
 		ifcopenshell::logger& logger_ = ifcopenshell::logger_or_root(logger);
 		std::set<int> elems_set(elems.begin(), elems.end());
 		ifcopenshell::geom::instance_id_filter af(include, false, elems_set);
-		return new ifcopenshell::geom::iterator(ifcopenshell::geom::kernels::construct(file, geometry_library, settings), settings, file, {af}, num_threads, logger_);
+		return new ifcopenshell::geom::iterator(ifcopenshell::geom::kernels::construct(file, geometry_library, settings, logger_), settings, file, {af}, num_threads, logger_);
 	}
 %}
 
@@ -993,7 +993,7 @@ struct shape_rtti : public boost::static_visitor<PyObject*>
 	static std::variant<ifcopenshell::geom::element*, ifcopenshell::geom::representation*, ifcopenshell::geom::transformation*> helper_fn_create_shape(ifcopenshell::logger& logger, const std::string& geometry_library, ifcopenshell::geom::settings& settings, const express::base& instance, const express::base& representation = express::base()) {
 		ifcopenshell::file* file = instance.file();
 
-		ifcopenshell::geom::converter kernel(ifcopenshell::geom::kernels::construct(file, geometry_library, settings), file, settings, logger);
+		ifcopenshell::geom::converter kernel(ifcopenshell::geom::kernels::construct(file, geometry_library, settings, logger), file, settings, logger);
 		if (instance.declaration().is("IfcProduct")) {
 			if (representation && !representation.declaration().is("IfcRepresentation")) {
 				throw ifcopenshell::exception("Supplied representation not of type IfcRepresentation");