diff --git a/src/ifcconvert/IfcConvert.cpp b/src/ifcconvert/IfcConvert.cpp
index ce1cfd7900..18810b9b1e 100644
--- a/src/ifcconvert/IfcConvert.cpp
+++ b/src/ifcconvert/IfcConvert.cpp
@@ -197,7 +197,7 @@ int main(int argc, char** argv) {
 	typedef char char_t;
 #endif
 
-	double deflection_tolerance, angular_tolerance;
+	double deflection_tolerance, angular_tolerance, force_space_transparency;
 	inclusion_filter include_filter;
 	inclusion_traverse_filter include_traverse_filter;
 	exclusion_filter exclude_filter;
@@ -326,6 +326,8 @@ int main(int argc, char** argv) {
 			"model in other modelling application in any case.")
 		("deflection-tolerance", po::value<double>(&deflection_tolerance)->default_value(1e-3),
 			"Sets the deflection tolerance of the mesher, 1e-3 by default if not specified.")
+		("force-space-transparency", po::value<double>(&force_space_transparency),
+			"Overrides transparency of spaces in geometry output.")
 		("angular-tolerance", po::value<double>(&angular_tolerance)->default_value(0.5),
 			"Sets the angular tolerance of the mesher in radians 0.5 by default if not specified.")
 		("generate-uvs",
@@ -718,6 +720,10 @@ int main(int argc, char** argv) {
 	settings.set_angular_tolerance(angular_tolerance);
 	settings.precision = precision;
 
+	if (vmap.count("force-space-transparency")) {
+		settings.force_space_transparency(force_space_transparency);
+	}
+
 	boost::shared_ptr<GeometrySerializer> serializer; /**< @todo use std::unique_ptr when possible */
 	if (output_extension == OBJ) {
         // Do not use temp file for MTL as it's such a small file.
diff --git a/src/ifcgeom/IfcGeomIteratorSettings.h b/src/ifcgeom/IfcGeomIteratorSettings.h
index f6d0a8f5dc..3de57e3c41 100644
--- a/src/ifcgeom/IfcGeomIteratorSettings.h
+++ b/src/ifcgeom/IfcGeomIteratorSettings.h
@@ -108,6 +108,7 @@ namespace IfcGeom
         /// Note that this is independent of the IFC length unit, one millimeter by default.
         double deflection_tolerance() const { return deflection_tolerance_; }
 		double angular_tolerance() const { return angular_tolerance_; }
+		double force_space_transparency() const { return force_space_transparency_; }
 
         void set_deflection_tolerance(double value)
         {
@@ -124,6 +125,10 @@ namespace IfcGeom
 			angular_tolerance_ = value;
 		}
 
+		void force_space_transparency(double value) {
+			force_space_transparency_ = value;
+		}		
+
         /// Get boolean value for a single settings or for a combination of settings.
         bool get(SettingField setting) const
         {
@@ -149,7 +154,7 @@ namespace IfcGeom
 
     protected:
         SettingField settings_;
-        double deflection_tolerance_, angular_tolerance_;
+        double deflection_tolerance_, angular_tolerance_, force_space_transparency_;
     };
 
     class IFC_GEOM_API ElementSettings : public IteratorSettings