diff --git a/libs/gfx/include/psemek/gfx/painter.hpp b/libs/gfx/include/psemek/gfx/painter.hpp
index 02c86d22..52f1ce4b 100644
--- a/libs/gfx/include/psemek/gfx/painter.hpp
+++ b/libs/gfx/include/psemek/gfx/painter.hpp
@@ -60,6 +60,7 @@ namespace psemek::gfx
 		// 3D
 		void axes(geom::point<float, 3> const & p, float length, float width);
 		void sphere(geom::point<float, 3> const & p, float radius, color const & c, int quality = 6);
+		void line3d(geom::point<float, 3> const & p0, geom::point<float, 3> const & p1, float width, color const & c);
 		void text3d(geom::point<float, 3> const & p, std::string_view str, text_options const & opts, geom::matrix<float, 3, 3> const & transform);
 
 		// Should be called on each frame
diff --git a/libs/gfx/source/painter.cpp b/libs/gfx/source/painter.cpp
index 350593c3..5a67ff13 100644
--- a/libs/gfx/source/painter.cpp
+++ b/libs/gfx/source/painter.cpp
@@ -356,6 +356,27 @@ namespace psemek::gfx
 		}
 	}
 
+	void painter::line3d(geom::point<float, 3> const & p0, geom::point<float, 3> const & p1, float width, color const & c)
+	{
+		std::uint32_t const base = impl().vertices.size();
+		float const r = width / 2.f;
+
+		auto const d = geom::normalized(p1 - p0);
+		geom::vector<float, 3> const o { -d[1], d[0], 0.f };
+
+		impl().vertices.push_back({{p0[0] + r * o[0], p0[1] + r * o[1], p0[2]}, c});
+		impl().vertices.push_back({{p0[0] - r * o[0], p0[1] - r * o[1], p0[2]}, c});
+		impl().vertices.push_back({{p1[0] + r * o[0], p1[1] + r * o[1], p1[2]}, c});
+		impl().vertices.push_back({{p1[0] - r * o[0], p1[1] - r * o[1], p1[2]}, c});
+
+		impl().indices.push_back(base + 0);
+		impl().indices.push_back(base + 1);
+		impl().indices.push_back(base + 3);
+		impl().indices.push_back(base + 0);
+		impl().indices.push_back(base + 3);
+		impl().indices.push_back(base + 2);
+	}
+
 	void painter::text3d(geom::point<float, 3> const & p, std::string_view str, text_options const & opts, geom::matrix<float, 3, 3> const & t)
 	{
 		auto const size = text_size(str, opts.f, opts.scale);