diff --git a/libs/pcg/include/psemek/pcg/fractal.hpp b/libs/pcg/include/psemek/pcg/fractal.hpp
index 3d478edf..446f8732 100644
--- a/libs/pcg/include/psemek/pcg/fractal.hpp
+++ b/libs/pcg/include/psemek/pcg/fractal.hpp
@@ -4,6 +4,7 @@
 #include <psemek/util/assert.hpp>
 
 #include <vector>
+#include <tuple>
 
 namespace psemek::pcg
 {
@@ -17,6 +18,9 @@ namespace psemek::pcg
 		template <typename Arg>
 		fractal(std::vector<Arg> args, std::vector<value_type> weights);
 
+		template <typename ... Args>
+		fractal(std::piecewise_construct_t, std::vector<std::tuple<Args...>> args, std::vector<value_type> weights);
+
 		template <typename ... Args>
 		value_type operator ()(Args const & ... args) const
 		{
@@ -41,6 +45,34 @@ namespace psemek::pcg
 			octaves.emplace_back(std::move(args[i]));
 	}
 
+	namespace detail
+	{
+
+		template <typename C, typename Tuple, std::size_t ... Is>
+		void emplace_back_from_tuple_impl(C & c, Tuple && tuple, std::index_sequence<Is...>)
+		{
+			c.emplace_back(std::get<Is>(tuple)...);
+		}
+
+		template <typename C, typename Tuple>
+		void emplace_back_from_tuple(C & c, Tuple && tuple)
+		{
+			emplace_back_from_tuple_impl(c, std::forward<Tuple>(tuple), std::make_index_sequence<std::tuple_size_v<Tuple>>{});
+		}
+
+	}
+
+	template <typename Generator>
+	template <typename ... Args>
+	fractal<Generator>::fractal(std::piecewise_construct_t, std::vector<std::tuple<Args...>> args, std::vector<value_type> weights)
+	{
+		assert(args.size() == weights.size());
+		this->weights = std::move(weights);
+		octaves.reserve(args.size());
+		for (std::size_t i = 0; i < args.size(); ++i)
+			detail::emplace_back_from_tuple(octaves, std::forward<std::tuple<Args...>>(args[i]));
+	}
+
 	template <typename Generator>
 	typename fractal<Generator>::value_type fractal<Generator>::operator()(geom::vector<value_type, dimension> const & p) const
 	{