diff --git a/wrap/io_trimesh/export_idtf.h b/wrap/io_trimesh/export_idtf.h
index 7a7f81e4..7c6ab926 100644
--- a/wrap/io_trimesh/export_idtf.h
+++ b/wrap/io_trimesh/export_idtf.h
@@ -136,10 +136,10 @@ typedef typename SaveMeshType::CoordType CoordType;
 			idtf.write(1,"RESOURCE_COUNT 1");
 			idtf.write(1,"RESOURCE 0 {");
 			idtf.write(2,"RESOURCE_NAME \"Material1\"");
-			idtf.write(2,"MATERIAL_AMBIENT 0.180000 0.060000 0.060000");
-			idtf.write(2,"MATERIAL_DIFFUSE 0.878431 0.560784 0.341176");
-			idtf.write(2,"MATERIAL_SPECULAR 0.0720000 0.0720000 0.0720000");
-			idtf.write(2,"MATERIAL_EMISSIVE 0.320000 0.320000 0.320000");
+			idtf.write(2,"MATERIAL_AMBIENT 0.2 0.2 0.2");
+			idtf.write(2,"MATERIAL_DIFFUSE 0.8 0.8 0.8");
+			idtf.write(2,"MATERIAL_SPECULAR 0.0 0.0 0.0");
+			idtf.write(2,"MATERIAL_EMISSIVE 0.0 0.0 0.0");
 			idtf.write(2,"MATERIAL_REFLECTIVITY 0.100000");
 			idtf.write(2,"MATERIAL_OPACITY 1.000000");
 			idtf.write(1,"}");