diff --git a/README.md b/README.md
index b74232d078..22aa5259b8 100644
--- a/README.md
+++ b/README.md
@@ -46,6 +46,8 @@ Instructions in a nutshell (**assuming Visual Studio 2015 x64 environment variab
     > build-deps.cmd
     > run-cmake.bat
 
+NB: `build-deps.cmd` need to be ran from the directory containing it, i.e. the `./win` folder.
+
 You can now open and build the solution file in Visual Studio:
 
     > ..\build-vs2015-x64\IfcOpenShell.sln
diff --git a/src/ifcconvert/IfcConvert.cpp b/src/ifcconvert/IfcConvert.cpp
index 0d9d0d8ae3..2b840e4240 100644
--- a/src/ifcconvert/IfcConvert.cpp
+++ b/src/ifcconvert/IfcConvert.cpp
@@ -269,6 +269,8 @@ int main(int argc, char** argv) {
 		("enable-layerset-slicing",
 			"Specifies whether to enable the slicing of products according "
 			"to their associated IfcMaterialLayerSet.")
+		("layerset-first", "Assigns the first layer material of the layerset "
+			"to the complete product.")
 		("include", po::value<inclusion_filter>(&include_filter)->multitoken(),
 			"Specifies that the instances that match a specific filtering criteria are to be included in the geometrical output:\n"
 			"1) 'entities': the following list of types should be included. SVG output defaults "
@@ -406,6 +408,7 @@ int main(int argc, char** argv) {
 	const bool include_plan = vmap.count("plan") != 0;
 	const bool include_model = vmap.count("model") != 0 || (!include_plan);
 	const bool enable_layerset_slicing = vmap.count("enable-layerset-slicing") != 0;
+	const bool layerset_first = vmap.count("layerset-first") != 0;
 	const bool use_element_names = vmap.count("use-element-names") != 0;
 	const bool use_element_guids = vmap.count("use-element-guids") != 0;
 	const bool use_material_names = vmap.count("use-material-names") != 0;
@@ -644,6 +647,7 @@ int main(int argc, char** argv) {
 	settings.set(IfcGeom::IteratorSettings::INCLUDE_CURVES,               include_plan);
 	settings.set(IfcGeom::IteratorSettings::EXCLUDE_SOLIDS_AND_SURFACES,  !include_model);
 	settings.set(IfcGeom::IteratorSettings::APPLY_LAYERSETS,              enable_layerset_slicing);
+	settings.set(IfcGeom::IteratorSettings::LAYERSET_FIRST,               layerset_first);
     settings.set(IfcGeom::IteratorSettings::NO_NORMALS, no_normals);
     settings.set(IfcGeom::IteratorSettings::GENERATE_UVS, generate_uvs);
 	settings.set(IfcGeom::IteratorSettings::SEARCH_FLOOR, use_element_hierarchy || output_extension == SVG);
diff --git a/src/ifcgeom/IfcGeom.h b/src/ifcgeom/IfcGeom.h
index baf6307e30..87664e7fcd 100644
--- a/src/ifcgeom/IfcGeom.h
+++ b/src/ifcgeom/IfcGeom.h
@@ -221,7 +221,8 @@ private:
 	double ifc_planeangle_unit;
 	double modelling_precision;
 	double dimensionality;
-	
+	double layerset_first;
+
 #ifndef NO_CACHE
 	MAKE_TYPE_NAME(Cache) cache;
 #endif
@@ -259,7 +260,7 @@ public:
 		setValue(GV_PLANEANGLE_UNIT,          other.getValue(GV_PLANEANGLE_UNIT));
 		setValue(GV_PRECISION,                other.getValue(GV_PRECISION));
 		setValue(GV_DIMENSIONALITY,           other.getValue(GV_DIMENSIONALITY));
-		setValue(GV_DEFLECTION_TOLERANCE,     other.getValue(GV_DEFLECTION_TOLERANCE));
+		setValue(GV_LAYERSET_FIRST,           other.getValue(GV_LAYERSET_FIRST));
 		return *this;
 	}
 
diff --git a/src/ifcgeom/IfcGeomFunctions.cpp b/src/ifcgeom/IfcGeomFunctions.cpp
index 8043921d8e..0a5557dc34 100644
--- a/src/ifcgeom/IfcGeomFunctions.cpp
+++ b/src/ifcgeom/IfcGeomFunctions.cpp
@@ -1317,6 +1317,9 @@ void IfcGeom::Kernel::setValue(GeomValue var, double value) {
 	case GV_MAX_FACES_TO_ORIENT:
 		max_faces_to_orient = value;
 		break;
+	case GV_LAYERSET_FIRST:
+		layerset_first = value;
+		break;
 	default:
 		throw std::runtime_error("Invalid setting");
 	}
@@ -1342,6 +1345,8 @@ double IfcGeom::Kernel::getValue(GeomValue var) const {
 		return dimensionality;
 	case GV_MAX_FACES_TO_ORIENT:
 		return max_faces_to_orient;
+	case GV_LAYERSET_FIRST:
+		return layerset_first;
 	}
 	throw std::runtime_error("Invalid setting");
 }
@@ -1644,11 +1649,11 @@ const IfcSchema::IfcMaterial* IfcGeom::Kernel::get_single_material_association(c
 		IfcSchema::IfcMaterialSelect* associated_material = (*associated_materials->begin())->RelatingMaterial();
 		single_material = associated_material->as<IfcSchema::IfcMaterial>();
 
-		// NB: Single-layer layersets are also considered, regardless of --enable-layerset-slicing, this
-		// in accordance with other viewers.
+		// NB: IfcMaterialLayerSets are also considered, regardless of --enable-layerset-slicing. Picking 
+		// the first material (in accordance with other viewers) when layerset-slicing is disabled.
 		if (!single_material && associated_material->as<IfcSchema::IfcMaterialLayerSetUsage>()) {
 			IfcSchema::IfcMaterialLayerSet* layerset = associated_material->as<IfcSchema::IfcMaterialLayerSetUsage>()->ForLayerSet();
-			if (layerset->MaterialLayers()->size() == 1) {
+			if (getValue(GV_LAYERSET_FIRST) > 0.0 ? layerset->MaterialLayers()->size() >= 1 : layerset->MaterialLayers()->size() == 1) {
 				IfcSchema::IfcMaterialLayer* layer = (*layerset->MaterialLayers()->begin());
 				if (layer->hasMaterial()) {
 					single_material = layer->Material();
diff --git a/src/ifcgeom/IfcGeomIteratorImplementation.h b/src/ifcgeom/IfcGeomIteratorImplementation.h
index e656d9e706..2926999ba4 100644
--- a/src/ifcgeom/IfcGeomIteratorImplementation.h
+++ b/src/ifcgeom/IfcGeomIteratorImplementation.h
@@ -971,6 +971,12 @@ namespace IfcGeom {
             kernel.setValue(IfcGeom::Kernel::GV_MAX_FACES_TO_ORIENT, settings.get(IteratorSettings::SEW_SHELLS) ? std::numeric_limits<double>::infinity() : -1);
             kernel.setValue(IfcGeom::Kernel::GV_DIMENSIONALITY, (settings.get(IteratorSettings::INCLUDE_CURVES)
                 ? (settings.get(IteratorSettings::EXCLUDE_SOLIDS_AND_SURFACES) ? -1. : 0.) : +1.));
+			kernel.setValue(IfcGeom::Kernel::GV_LAYERSET_FIRST,
+				settings.get(IteratorSettings::LAYERSET_FIRST)
+				? +1.0
+				: -1.0
+			);
+
 			if (settings.get(IteratorSettings::BUILDING_LOCAL_PLACEMENT)) {
 				if (settings.get(IteratorSettings::SITE_LOCAL_PLACEMENT)) {
 					Logger::Message(Logger::LOG_WARNING, "building-local-placement takes precedence over site-local-placement");
diff --git a/src/ifcgeom/IfcGeomIteratorSettings.h b/src/ifcgeom/IfcGeomIteratorSettings.h
index 7928d296ec..a78acbd2ef 100644
--- a/src/ifcgeom/IfcGeomIteratorSettings.h
+++ b/src/ifcgeom/IfcGeomIteratorSettings.h
@@ -86,8 +86,10 @@ namespace IfcGeom
 			BUILDING_LOCAL_PLACEMENT = 1 << 16,
 			///
 			VALIDATE_QUANTITIES = 1 << 17,
+			/// Assigns the first layer material to the entire product
+			LAYERSET_FIRST = 1 << 18,
 			/// Number of different setting flags.
-			NUM_SETTINGS = 17
+			NUM_SETTINGS = 18
         };
         /// Used to store logical OR combination of setting flags.
         typedef unsigned SettingField;
diff --git a/src/ifcgeom_schema_agnostic/Kernel.h b/src/ifcgeom_schema_agnostic/Kernel.h
index 21a76b8fe4..b42f246dff 100644
--- a/src/ifcgeom_schema_agnostic/Kernel.h
+++ b/src/ifcgeom_schema_agnostic/Kernel.h
@@ -49,7 +49,8 @@ namespace IfcGeom {
 			// Default: 0.00001 (obtained from IfcGeometricRepresentationContext if available)
 			GV_PRECISION,
 			// Whether to process shapes of type Face or higher (1) Wire or lower (-1) or all (0)
-			GV_DIMENSIONALITY
+			GV_DIMENSIONALITY,
+            GV_LAYERSET_FIRST
 		};
 
 		Kernel(IfcParse::IfcFile* file_ = 0);
diff --git a/src/ifcwrap/IfcGeomWrapper.i b/src/ifcwrap/IfcGeomWrapper.i
index e81e055597..eb7051ed37 100644
--- a/src/ifcwrap/IfcGeomWrapper.i
+++ b/src/ifcwrap/IfcGeomWrapper.i
@@ -325,6 +325,11 @@ struct ShapeRTTI : public boost::static_visitor<PyObject*>
 		IfcGeom::Kernel kernel(file);
 		kernel.setValue(IfcGeom::Kernel::GV_MAX_FACES_TO_ORIENT, settings.get(IfcGeom::IteratorSettings::SEW_SHELLS) ? std::numeric_limits<double>::infinity() : -1);
 		kernel.setValue(IfcGeom::Kernel::GV_DIMENSIONALITY, (settings.get(IfcGeom::IteratorSettings::INCLUDE_CURVES) ? (settings.get(IfcGeom::IteratorSettings::EXCLUDE_SOLIDS_AND_SURFACES) ? -1. : 0.) : +1.));
+		kernel.setValue(IfcGeom::Kernel::GV_LAYERSET_FIRST,
+			settings.get(IteratorSettings::LAYERSET_FIRST)
+			? +1.0
+			: -1.0
+		);
 			
 		if (instance->declaration().is(Schema::IfcProduct::Class())) {
 			if (representation) {
diff --git a/win/build-deps.cmd b/win/build-deps.cmd
index 2f30e1e55b..b0a3a2fc5f 100644
--- a/win/build-deps.cmd
+++ b/win/build-deps.cmd
@@ -24,6 +24,13 @@
 @echo off
 echo.
 
+for %%Q in ("%~dp0\.") DO set "batpath=%%~fQ"
+
+if NOT "%CD%" == "%batpath%" (
+    GOTO :ErrorAndPrintUsage
+)
+
+
 set PROJECT_NAME=IfcOpenShell
 call utils\cecho.cmd 15 0 "This script fetches and builds all %PROJECT_NAME% dependencies"
 echo.
@@ -535,3 +542,5 @@ echo   - https://www.visualstudio.com/
 echo  5. Run this batch script with Visual Studio environment variables set.
 echo   - https://msdn.microsoft.com/en-us/library/ms229859(v=vs.110).aspx
 echo.
+echo NB: This script needs to be ran from the directory directly containing it.
+echo.