diff --git a/include/fractal.hpp b/include/fractal.hpp
index 774e5e5..129d8a5 100644
--- a/include/fractal.hpp
+++ b/include/fractal.hpp
@@ -40,6 +40,11 @@ struct group_characteristic_t {
 	etl::vector<variable_id_t, g_max_group_size> m_variable_ids;
 };
 
+struct marker_t {
+	mtl::vec2 m_pos;
+	uint32_t m_id;
+};
+
 struct leaf_t {
 	group_id_t m_group_id;
 	mtl::vec2 m_position;
@@ -54,10 +59,10 @@ struct weighted_leaf_t {
 
 struct group_t {
 	static constexpr size_t g_max_child_leafs = 16;
-	static constexpr size_t g_max_group_points = 8;
+	static constexpr size_t g_max_child_markers = 8;
 
 	etl::vector<weighted_leaf_t, g_max_child_leafs> m_child_leafs;
-	etl::vector<mtl::vec2, g_max_group_points> m_points;
+	etl::vector<marker_t, g_max_child_markers> m_child_markers;
 };
 
 struct weighted_group_t {