diff --git a/CMakeLists.txt b/CMakeLists.txt
index 36aa73537..589b90f49 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -272,6 +272,7 @@ set ( noggit_ui_sources
       src/noggit/ui/noggit_tool.cpp
       src/noggit/ui/ObjectEditor.cpp
       src/noggit/ui/RotationEditor.cpp
+      src/noggit/ui/shadow_editor.cpp
       src/noggit/ui/slider_spinbox.cpp
       src/noggit/ui/TexturePicker.cpp
       src/noggit/ui/texture_swapper.cpp
@@ -388,6 +389,7 @@ set ( noggit_ui_headers
       src/noggit/ui/noggit_tool.hpp
       src/noggit/ui/ObjectEditor.h
       src/noggit/ui/RotationEditor.h
+      src/noggit/ui/shadow_editor.hpp
       src/noggit/ui/slider_spinbox.hpp
       src/noggit/ui/TexturePicker.h
       src/noggit/ui/texture_swapper.hpp
diff --git a/src/noggit/MapChunk.cpp b/src/noggit/MapChunk.cpp
index 818a6ea7c..94f5d3bbb 100644
--- a/src/noggit/MapChunk.cpp
+++ b/src/noggit/MapChunk.cpp
@@ -1489,6 +1489,51 @@ void MapChunk::clear_shadows()
   _chunk_shadow.reset();
 }
 
+void MapChunk::set_shadow(math::vector_3d const& pos, float radius, bool add)
+{
+  if (misc::getShortestDist(pos.x, pos.z, xbase, zbase, CHUNKSIZE) > radius)
+  {
+    return;
+  }
+
+  if (!_chunk_shadow)
+  {
+    _chunk_shadow = std::make_unique<chunk_shadow>();
+  }
+
+  math::vector_3d p(xbase, 0.f, zbase);
+
+  for (int ix = 0; ix < 64; ++ix)
+  {
+    p.z = zbase;
+
+    for (int iz = 0; iz < 64; ++iz)
+    {
+      if (misc::getShortestDist(pos, p, TEXDETAILSIZE) <= radius)
+      {
+        std::uint64_t& value = _chunk_shadow.get()->data[iz];
+        std::uint64_t flag = std::uint64_t(1) << ix;
+
+        if (add)
+        {
+          value |= flag;
+        }
+        else
+        {
+          value &= ~flag;
+        }
+      }
+
+      p.z += TEXDETAILSIZE;
+    }
+
+    p.x += TEXDETAILSIZE;
+  }
+
+  texture_set_changed();
+  texture_set->require_update(); // shadows are tied with the alphamap
+}
+
 bool MapChunk::isHole(int i, int j) const
 {
   if (_preview_data)
diff --git a/src/noggit/MapChunk.h b/src/noggit/MapChunk.h
index 2a4352392..2e9bca291 100644
--- a/src/noggit/MapChunk.h
+++ b/src/noggit/MapChunk.h
@@ -211,6 +211,7 @@ class MapChunk
   void clear_texture_flags();
 
   void clear_shadows();
+  void set_shadow(math::vector_3d const& pos, float radius, bool add);
 
   //! \todo implement Action stack for these
   bool isHole(int i, int j) const;
diff --git a/src/noggit/MapView.cpp b/src/noggit/MapView.cpp
index 66c8d4130..575d48af5 100644
--- a/src/noggit/MapView.cpp
+++ b/src/noggit/MapView.cpp
@@ -25,6 +25,7 @@
 #include <noggit/ui/ModelImport.h>
 #include <noggit/ui/ObjectEditor.h>
 #include <noggit/ui/RotationEditor.h>
+#include <noggit/ui/shadow_editor.hpp>
 #include <noggit/ui/TexturePicker.h>
 #include <noggit/ui/TexturingGUI.h>
 #include <noggit/ui/Toolbar.h> // noggit::ui::toolbar
@@ -153,6 +154,10 @@ void MapView::setToolPropertyWidgetVisibility(editing_mode mode)
     _chunk_mover_dock->setVisible(!ui_hidden);
     _current_tool = _chunk_mover_ui;
     break;
+  case editing_mode::shadows:
+    _shadow_tool_dock->setVisible(!ui_hidden);
+    _current_tool = _shadow_tool;
+    break;
   }
 }
 
@@ -301,6 +306,12 @@ void MapView::createGUI()
   _chunk_mover_dock->setWidget(_chunk_mover_ui);
   _tool_properties_docks.insert(_chunk_mover_dock);
 
+  // shadow tool
+  _shadow_tool_dock = new QDockWidget("Shadow Tool", this);
+  _shadow_tool = new noggit::ui::shadow_editor(_shadow_tool_dock);
+  _shadow_tool_dock->setWidget(_shadow_tool);
+  _tool_properties_docks.insert(_shadow_tool_dock);
+
   for (auto widget : _tool_properties_docks)
   {
     connect(this, &QObject::destroyed, widget, &QObject::deleteLater);
@@ -2503,6 +2514,9 @@ void MapView::draw_map()
   case editing_mode::chunk_mover:
     radius = _chunk_mover_ui->radius();
     break;
+  case editing_mode::shadows:
+    radius = _shadow_tool->radius();
+    break;
   }
 
   bool use_liquid_intersect = terrainMode == editing_mode::water && guiWater->use_liquids_intersect();
diff --git a/src/noggit/MapView.h b/src/noggit/MapView.h
index 5edb6a9cd..1e3cdbb8f 100644
--- a/src/noggit/MapView.h
+++ b/src/noggit/MapView.h
@@ -43,6 +43,7 @@ namespace noggit
     class help;
     class minimap_widget;
     class shader_tool;
+    class shadow_editor;
     class terrain_tool;
     class texture_picker;
     class texturing_tool;
@@ -334,5 +335,8 @@ public slots:
   noggit::ui::chunk_mover_ui* _chunk_mover_ui;
   QDockWidget* _chunk_mover_dock;
 
+  noggit::ui::shadow_editor* _shadow_tool;
+  QDockWidget* _shadow_tool_dock;
+
   noggit::ui::noggit_tool* _current_tool = nullptr;
 };
diff --git a/src/noggit/World.cpp b/src/noggit/World.cpp
index a7450a13d..6dbf3d225 100644
--- a/src/noggit/World.cpp
+++ b/src/noggit/World.cpp
@@ -2180,6 +2180,18 @@ void World::setHoleADT(math::vector_3d const& pos, bool hole)
   for_all_chunks_on_tile(pos, [&](MapChunk* chunk) { chunk->setHole(pos, true, hole); });
 }
 
+void World::set_shadow(math::vector_3d const& pos, float radius, bool add)
+{
+  for_all_chunks_in_range
+  ( pos, radius
+    , [&](MapChunk* chunk)
+    {
+      chunk->set_shadow(pos, radius, add);
+      return true;
+    }
+  );
+}
+
 
 template<typename Fun>
   void World::for_all_chunks_on_tile (math::vector_3d const& pos, Fun&& fun)
diff --git a/src/noggit/World.h b/src/noggit/World.h
index a2ee66cb6..8cc464a9d 100644
--- a/src/noggit/World.h
+++ b/src/noggit/World.h
@@ -285,6 +285,8 @@ class World
   void setHole(math::vector_3d const& pos, bool big, bool hole);
   void setHoleADT(math::vector_3d const& pos, bool hole);
 
+  void set_shadow(math::vector_3d const& pos, float radius, bool add);
+
   ModelInstance* addM2 ( std::string const& filename
              , math::vector_3d newPos
              , float scale, math::degrees::vec3 rotation
diff --git a/src/noggit/tool_enums.hpp b/src/noggit/tool_enums.hpp
index 3e1716920..aeaf23f6d 100644
--- a/src/noggit/tool_enums.hpp
+++ b/src/noggit/tool_enums.hpp
@@ -83,6 +83,7 @@ enum class editing_mode
 #endif
   clearing,
   chunk_mover,
+  shadows,
 };
 
 enum class water_opacity : int
diff --git a/src/noggit/ui/Help.cpp b/src/noggit/ui/Help.cpp
index 3c18c972c..e8b44a897 100644
--- a/src/noggit/ui/Help.cpp
+++ b/src/noggit/ui/Help.cpp
@@ -318,6 +318,14 @@ namespace noggit
       generate_hotkey_row({ font_noggit::t }, "\a - Toggle preview", chunk_mover_layout);
       generate_hotkey_row({ font_noggit::space, font_noggit::mmb }, "\a+\a - Change height offset", chunk_mover_layout);
 
+
+      auto shadow_widget(new QWidget(this));
+      auto shadow_layout(new QFormLayout(shadow_widget));
+
+      generate_hotkey_row({ font_noggit::shift, font_noggit::lmb }, "\a+\a - Add shadows", shadow_layout);
+      generate_hotkey_row({ font_noggit::ctrl, font_noggit::lmb }, "\a+\a - Remove shadows", shadow_layout);
+      generate_hotkey_row({ font_noggit::alt, font_noggit::lmb_drag }, "\a+\a - Change brush size", shadow_layout);
+
       layout->addWidget(tabs);
       tabs->addTab(base_widget, "Base");
       tabs->addTab(ground_widget, "Terrain");
@@ -328,6 +336,7 @@ namespace noggit
       tabs->addTab(flag_widget, "Flags/Hole/Area");
       tabs->addTab(clearing_widget, "Clearing");
       tabs->addTab(chunk_mover_widget, "Chunk Mover");
+      tabs->addTab(shadow_widget, "Shadows");
     }
 
 
diff --git a/src/noggit/ui/Toolbar.cpp b/src/noggit/ui/Toolbar.cpp
index a00501e3d..bf846fef2 100644
--- a/src/noggit/ui/Toolbar.cpp
+++ b/src/noggit/ui/Toolbar.cpp
@@ -24,6 +24,7 @@ namespace noggit
 #endif
       add_tool_icon(editing_mode::clearing, tr("Clearing Tool"), font_awesome::eraser);
       add_tool_icon(editing_mode::chunk_mover, tr("Chunk Mover"), font_awesome::arrowsalt);
+      add_tool_icon(editing_mode::shadows, tr("Shadows Editor"), font_awesome::cloudsun);
     }
 
     void toolbar::add_tool_icon(editing_mode mode, const QString& name, const font_awesome::icons& icon)
diff --git a/src/noggit/ui/shadow_editor.cpp b/src/noggit/ui/shadow_editor.cpp
new file mode 100644
index 000000000..e8601de9e
--- /dev/null
+++ b/src/noggit/ui/shadow_editor.cpp
@@ -0,0 +1,46 @@
+// This file is part of Noggit3, licensed under GNU General Public License (version 3).
+
+#include <noggit/ui/shadow_editor.hpp>
+#include <noggit/ui/slider_spinbox.hpp>
+#include <noggit/World.h>
+
+
+#include <QtWidgets/QFormLayout>
+#include <QKeyEvent>
+
+
+namespace noggit::ui
+{
+  shadow_editor::shadow_editor(QWidget* parent)
+    : noggit_tool(parent)
+    , _radius_property(10.f)
+  {
+    auto layout(new QFormLayout(this));
+
+    layout->addWidget(new slider_spinbox("Radius", &_radius_property, 0.f, 100.f, 2, this));
+  }
+
+
+  void shadow_editor::tick(float dt, math::vector_3d const& cursor_pos, bool cursor_under_map, World* world)
+  {
+    if (!cursor_under_map && _left_mouse_button)
+    {
+      if (_mod_shift_down)
+      {
+        world->set_shadow(cursor_pos, _radius_property.get(), true);
+      }
+      if (_mod_ctrl_down)
+      {
+        world->set_shadow(cursor_pos, _radius_property.get(), false);
+      }
+    }
+  }
+
+  void shadow_editor::mouse_move_event(QLineF const& relative_movement)
+  {
+    if (_left_mouse_button && _mod_alt_down)
+    {
+      change_radius(relative_movement.dx() / mouse_sensibility);
+    }
+  }
+}
diff --git a/src/noggit/ui/shadow_editor.hpp b/src/noggit/ui/shadow_editor.hpp
new file mode 100644
index 000000000..9e01dfdf2
--- /dev/null
+++ b/src/noggit/ui/shadow_editor.hpp
@@ -0,0 +1,26 @@
+// This file is part of Noggit3, licensed under GNU General Public License (version 3).
+
+#pragma once
+
+#include <math/vector_4d.hpp>
+#include <noggit/float_property.hpp>
+#include <noggit/ui/noggit_tool.hpp>
+
+
+namespace noggit::ui
+{
+  class shadow_editor : public noggit_tool
+  {
+  public:
+    shadow_editor(QWidget* parent = nullptr);
+
+    void change_radius(float change) { _radius_property.change(change); }
+    float radius() const { return _radius_property.get(); }
+
+    virtual void tick(float dt, math::vector_3d const& cursor_pos, bool cursor_under_map, World* world) override;
+    virtual void mouse_move_event(QLineF const& relative_movement) override;
+
+  private:
+    float_property _radius_property;
+  };
+}