diff --git a/libs/pcg/include/psemek/pcg/perlin.hpp b/libs/pcg/include/psemek/pcg/perlin.hpp
index 083ae4d0..c38f7b76 100644
--- a/libs/pcg/include/psemek/pcg/perlin.hpp
+++ b/libs/pcg/include/psemek/pcg/perlin.hpp
@@ -2,6 +2,7 @@
 
 #include <psemek/gfx/pixmap.hpp>
 #include <psemek/geom/vector.hpp>
+#include <psemek/pcg/seamless.hpp>
 
 namespace psemek::pcg
 {
@@ -10,6 +11,7 @@ namespace psemek::pcg
 	{
 		perlin() = default;
 		perlin(gfx::basic_pixmap<geom::vector<float, 2>> grad_map);
+		perlin(gfx::basic_pixmap<geom::vector<float, 2>> const & grad_map, seamless_tag);
 		perlin(perlin &&) = default;
 
 		perlin & operator = (perlin &&) = default;
diff --git a/libs/pcg/include/psemek/pcg/seamless.hpp b/libs/pcg/include/psemek/pcg/seamless.hpp
new file mode 100644
index 00000000..bf44a5de
--- /dev/null
+++ b/libs/pcg/include/psemek/pcg/seamless.hpp
@@ -0,0 +1,10 @@
+#pragma once
+
+namespace psemek::pcg
+{
+
+	struct seamless_tag{};
+
+	constexpr seamless_tag seamless;
+
+}
diff --git a/libs/pcg/source/perlin.cpp b/libs/pcg/source/perlin.cpp
index 9d3c87be..4ebcd909 100644
--- a/libs/pcg/source/perlin.cpp
+++ b/libs/pcg/source/perlin.cpp
@@ -11,6 +11,22 @@ namespace psemek::pcg
 		: grad_map_(std::move(grad_map))
 	{}
 
+	perlin::perlin(gfx::basic_pixmap<geom::vector<float, 2>> const & grad_map, seamless_tag)
+	{
+		auto const w = grad_map.width();
+		auto const h = grad_map.height();
+
+		grad_map_.resize({w + 1, h + 1});
+
+		for (std::size_t j = 0; j <= h; ++j)
+		{
+			for (std::size_t i = 0; i <= w; ++i)
+			{
+				grad_map_(i, j) = grad_map(i % w, j % h);
+			}
+		}
+	}
+
 	static float step(float x0, float x1, float t)
 	{
 		return x0 * (1.f - t) + x1 * t;