diff --git a/plugins/rendermax/CMakeLists.txt b/plugins/rendermax/CMakeLists.txt
index a05294a09..5fcf4d6a9 100644
--- a/plugins/rendermax/CMakeLists.txt
+++ b/plugins/rendermax/CMakeLists.txt
@@ -36,4 +36,4 @@ ENDIF(UNIX)
 # this makes sure all the stuff is put in proper places and linked to dfhack
 DFHACK_PLUGIN(rendermax ${PROJECT_SRCS} LINK_LIBRARIES ${PROJECT_LIBS})
 install(FILES rendermax.lua
-        DESTINATION ${DFHACK_DATA_DESTINATION})
\ No newline at end of file
+        DESTINATION ${DFHACK_BINARY_DESTINATION})
\ No newline at end of file
diff --git a/plugins/rendermax/renderer_light.cpp b/plugins/rendermax/renderer_light.cpp
index 6448532ec..980d1250c 100644
--- a/plugins/rendermax/renderer_light.cpp
+++ b/plugins/rendermax/renderer_light.cpp
@@ -27,7 +27,7 @@ using df::global::gps;
 using namespace DFHack;
 using df::coord2d;
 
-const float levelDim=0.2f;
+
 const float RootTwo = 1.4142135623730950488016887242097f;
 
 lightSource::lightSource(lightCell power,int radius):power(power),flicker(false)
@@ -36,6 +36,7 @@ lightSource::lightSource(lightCell power,int radius):power(power),flicker(false)
         this->radius = radius;
     else
     {
+        float levelDim = 0.2f;
         float totalPower = power.r;
         if(totalPower < power.g)totalPower = power.g;
         if(totalPower < power.b)totalPower = power.b;
@@ -239,6 +240,16 @@ void lightingEngineViewscreen::doFovs()
             }
         }
 }
+void lightingEngineViewscreen::clear()
+{
+    lightMap.assign(lightMap.size(),lightCell(1,1,1));
+    tthread::lock_guard<tthread::fast_mutex> guard(myRenderer->dataMutex);
+    if(lightMap.size()==myRenderer->lightGrid.size())
+    {
+        std::swap(myRenderer->lightGrid,lightMap);
+        myRenderer->invalidate();
+    }
+}
 void lightingEngineViewscreen::calculate()
 {
     rect2d vp=getMapViewport();
@@ -270,8 +281,8 @@ void lightingEngineViewscreen::updateWindow()
     std::swap(lightMap,myRenderer->lightGrid);
     rect2d vp=getMapViewport();
     
-    //myRenderer->invalidateRect(vp.first.x,vp.first.y,vp.second.x-vp.first.x,vp.second.y-vp.first.y);
-    myRenderer->invalidate();
+    myRenderer->invalidateRect(vp.first.x,vp.first.y,vp.second.x-vp.first.x,vp.second.y-vp.first.y);
+    //myRenderer->invalidate();
     //std::copy(lightMap.begin(),lightMap.end(),myRenderer->lightGrid.begin());
 }
 void lightSource::combine(const lightSource& other)
@@ -462,7 +473,7 @@ void lightingEngineViewscreen::doSun(const lightSource& sky,MapExtras::MapCache&
 void lightingEngineViewscreen::doOcupancyAndLights()
 {
     // TODO better curve (+red dawn ?)
-    float daycol = 0;//abs((*df::global::cur_year_tick % 1200) - 600.0) / 400.0;
+    float daycol = 1;//abs((*df::global::cur_year_tick % 1200) - 600.0) / 400.0;
     lightCell sky_col(daycol, daycol, daycol);
     lightSource sky(sky_col, 15);
 
@@ -602,21 +613,20 @@ void lightingEngineViewscreen::doOcupancyAndLights()
     }
     if(df::global::cursor->x>-30000)
     {
-        //lightSource cursor(lightCell(9.6f,8.4f,0.3f),-1);
-        //cursor.flicker=false;
         int wx=df::global::cursor->x-window_x+vp.first.x;
         int wy=df::global::cursor->y-window_y+vp.first.y;
         int tile=getIndex(wx,wy);
         applyMaterial(tile,matCursor);
     }
-    lightSource citizen(lightCell(0.80f,0.80f,0.90f),6);
+    //citizen only emit light, if defined
+    if(matCitizen.isEmiting)
     for (int i=0;i<df::global::world->units.active.size();++i)
     {
         df::unit *u = df::global::world->units.active[i];
         coord2d pos=worldToViewportCoord(coord2d(u->pos.x,u->pos.y),vp,window2d);
         if(u->pos.z==window_z && isInViewport(pos,vp))
         if (DFHack::Units::isCitizen(u) && !u->counters.unconscious)
-            addLight(getIndex(pos.x,pos.y),citizen);
+            addLight(getIndex(pos.x,pos.y),matCitizen.makeSource());
     }
     //buildings
     for(size_t i = 0; i < df::global::world->buildings.all.size(); i++)
@@ -754,6 +764,10 @@ int lightingEngineViewscreen::parseSpecial(lua_State* L)
     LOAD_SPECIAL(FROZEN_LIQUID,matIce);
     LOAD_SPECIAL(AMBIENT,matAmbience);
     LOAD_SPECIAL(CURSOR,matCursor);
+    LOAD_SPECIAL(CITIZEN,matCitizen);
+    lua_getfield(L,-1,"LevelDim");
+    if(!lua_isnil(L,-1) && lua_isnumber(L,-1))engine->levelDim=lua_tonumber(L,-1);
+    lua_pop(L,1);
     return 0;
 }
 #undef LOAD_SPECIAL
@@ -766,6 +780,8 @@ void lightingEngineViewscreen::defaultSettings()
     matCursor=matLightDef(lightCell(0.96f,0.84f,0.03f),11);
     matCursor.flicker=true;
     matWall=matLightDef(lightCell(0,0,0));
+    matCitizen=matLightDef(lightCell(0.8f,0.8f,0.9f),6);
+    levelDim=0.2f;
 }
 void lightingEngineViewscreen::loadSettings()
 {
@@ -782,6 +798,7 @@ void lightingEngineViewscreen::loadSettings()
         if(ret==LUA_ERRFILE)
         {
             out.printerr("File not found:%s\n",settingsfile.c_str());
+            lua_pop(s,1);
         }
         else if(ret==LUA_ERRSYNTAX)
         {
@@ -805,6 +822,7 @@ void lightingEngineViewscreen::loadSettings()
                 Lua::SafeCall(out,s,2,0);
                 
             }
+            
         }
     }
     catch(std::exception& e)
diff --git a/plugins/rendermax/renderer_light.hpp b/plugins/rendermax/renderer_light.hpp
index 668a729a5..e3122a8ca 100644
--- a/plugins/rendermax/renderer_light.hpp
+++ b/plugins/rendermax/renderer_light.hpp
@@ -75,6 +75,7 @@ public:
     virtual void updateWindow()=0;
 
     virtual void loadSettings()=0;
+    virtual void clear()=0;
     
 protected:
     renderer_light* myRenderer;
@@ -108,7 +109,7 @@ struct matLightDef
     bool flicker;
     lightCell emitColor;
     int radius;
-    matLightDef(){}
+    matLightDef():isTransparent(false),isEmiting(false),transparency(0,0,0),emitColor(0,0,0),radius(0){}
     matLightDef(lightCell transparency,lightCell emit,int rad):isTransparent(true),isEmiting(true),
         transparency(transparency),emitColor(emit),radius(rad){}
     matLightDef(lightCell emit,int rad):isTransparent(false),isEmiting(true),emitColor(emit),radius(rad),transparency(0,0,0){}
@@ -130,6 +131,7 @@ public:
     void updateWindow();
 
     void loadSettings();
+    void clear();
 private:
 
     df::coord2d worldToViewportCoord(const df::coord2d& in,const DFHack::rect2d& r,const df::coord2d& window2d) ;
@@ -170,6 +172,8 @@ private:
     matLightDef matCursor;
     matLightDef matWall;
     matLightDef matWater;
+    matLightDef matCitizen;
+    float levelDim;
     //materials
     std::map<std::pair<int,int>,matLightDef> matDefs;
 
diff --git a/plugins/rendermax/renderer_opengl.hpp b/plugins/rendermax/renderer_opengl.hpp
index 6beba522f..57e81295b 100644
--- a/plugins/rendermax/renderer_opengl.hpp
+++ b/plugins/rendermax/renderer_opengl.hpp
@@ -124,13 +124,13 @@ public:
         for(int j=y;j<y+h;j++)
         {
             int index=i*df::global::gps->dimy + j;
-            screen_old[index*4]=0;
+            screen_old[index*4]=screen[index*4]+1;//ensure tile is different
         }
     };
     void invalidate()
     {
-        //invalidateRect(0,0,df::global::gps->dimx,df::global::gps->dimy);
-        df::global::gps->force_full_display_count++;
+        invalidateRect(0,0,df::global::gps->dimx,df::global::gps->dimy);
+        //df::global::gps->force_full_display_count++;
     };
 protected:
     renderer* parent;
diff --git a/plugins/rendermax/rendermax.cpp b/plugins/rendermax/rendermax.cpp
index dda0d5d2c..482dfa6cb 100644
--- a/plugins/rendermax/rendermax.cpp
+++ b/plugins/rendermax/rendermax.cpp
@@ -3,6 +3,8 @@
 
 #include <LuaTools.h>
 
+#include <VTableInterpose.h>
+
 #include "Core.h"
 #include "Console.h"
 #include "Export.h"
@@ -15,12 +17,18 @@
 #include "renderer_opengl.hpp"
 #include "renderer_light.hpp"
 
+#include "df/viewscreen_dwarfmodest.h"
+#include "df/viewscreen_dungeonmodest.h"
+
+using df::viewscreen_dungeonmodest;
+using df::viewscreen_dwarfmodest;
+
 using namespace DFHack;
 using std::vector;
 using std::string;
 enum RENDERER_MODE
 {
-    MODE_DEFAULT,MODE_TRIPPY,MODE_TRUECOLOR,MODE_LUA,MODE_LIGHT,MODE_LIGHT_OFF
+    MODE_DEFAULT,MODE_TRIPPY,MODE_TRUECOLOR,MODE_LUA,MODE_LIGHT
 };
 RENDERER_MODE current_mode=MODE_DEFAULT;
 lightingEngine *engine=NULL;
@@ -42,10 +50,44 @@ DFhackCExport command_result plugin_init (color_ostream &out, std::vector <Plugi
         ));
     return CR_OK;
 }
+
+struct dwarmode_render_hook : viewscreen_dwarfmodest{
+    typedef df::viewscreen_dwarfmodest interpose_base;
+    DEFINE_VMETHOD_INTERPOSE(void,render,())
+    {
+        CoreSuspendClaimer suspend;
+        INTERPOSE_NEXT(render)();
+        engine->calculate();
+        engine->updateWindow();
+    }
+};
+IMPLEMENT_VMETHOD_INTERPOSE(dwarmode_render_hook, render);
+
+struct dungeon_render_hook : viewscreen_dungeonmodest{
+    typedef df::viewscreen_dungeonmodest interpose_base;
+    DEFINE_VMETHOD_INTERPOSE(void,render,())
+    {
+        CoreSuspendClaimer suspend;
+        INTERPOSE_NEXT(render)();
+        engine->calculate();
+        engine->updateWindow();
+    }
+};
+IMPLEMENT_VMETHOD_INTERPOSE(dungeon_render_hook, render);
+
 void removeOld()
 {
+    if(engine)
+    {
+        CoreSuspender lock;
+        INTERPOSE_HOOK(dwarmode_render_hook,render).apply(false);
+        INTERPOSE_HOOK(dungeon_render_hook,render).apply(false);
+        delete engine;
+
+    }
     if(current_mode!=MODE_DEFAULT)
         delete df::global::enabler->renderer;
+    
     current_mode=MODE_DEFAULT;
 }
 void installNew(df::renderer* r,RENDERER_MODE newMode)
@@ -231,6 +273,10 @@ DFHACK_PLUGIN_LUA_COMMANDS {
     DFHACK_LUA_COMMAND(invalidate),
     DFHACK_LUA_END
 };
+
+
+
+
 static command_result rendermax(color_ostream &out, vector <string> & parameters)
 {
     if(parameters.size()==0)
@@ -304,19 +350,22 @@ static command_result rendermax(color_ostream &out, vector <string> & parameters
     }
     else if(cmd=="light")
     {
-        if(current_mode!=MODE_LIGHT || current_mode!=MODE_LIGHT_OFF)
+        if(current_mode!=MODE_LIGHT)
         {
             removeOld();
             renderer_light *myRender=new renderer_light(df::global::enabler->renderer);
             installNew(myRender,MODE_LIGHT);
             engine=new lightingEngineViewscreen(myRender);
-            engine->calculate();
-            engine->updateWindow();
+            INTERPOSE_HOOK(dwarmode_render_hook,render).apply(true);
+            INTERPOSE_HOOK(dungeon_render_hook,render).apply(true);
         }
         else if(current_mode==MODE_LIGHT && parameters.size()>1)
         {
             if(parameters[1]=="reload")
+            {
+                CoreSuspender suspend;
                 engine->loadSettings();
+            }
         }
         else
             out.printerr("Light mode already enabled");
@@ -327,8 +376,6 @@ static command_result rendermax(color_ostream &out, vector <string> & parameters
     {
         if(current_mode==MODE_DEFAULT)
             out.print("%s\n","Not installed, doing nothing.");
-        else if(current_mode==MODE_LIGHT)
-            current_mode=MODE_LIGHT_OFF;
         else
             removeOld();
         
@@ -336,27 +383,21 @@ static command_result rendermax(color_ostream &out, vector <string> & parameters
     }
     return CR_WRONG_USAGE;
 }
-DFhackCExport command_result plugin_onupdate (color_ostream &out)
+
+DFhackCExport command_result plugin_shutdown(color_ostream &)
+{
+    removeOld();
+    return CR_OK;
+}
+DFhackCExport command_result plugin_onstatechange(color_ostream &out, state_change_event event)
 {
-    if(engine)
+    if(event==SC_VIEWSCREEN_CHANGED)
     {
-        if(current_mode==MODE_LIGHT_OFF)
+        CoreSuspendClaimer suspender;
+        if(current_mode==MODE_LIGHT)
         {
-            delete engine;
-            engine=0;
-            removeOld();
-        }
-        else
-        {
-            engine->calculate();
-            engine->updateWindow();
+            engine->clear();
         }
     }
-    
-    return CR_OK;
-}
-DFhackCExport command_result plugin_shutdown(color_ostream &)
-{
-    removeOld();
     return CR_OK;
 }
\ No newline at end of file
diff --git a/plugins/rendermax/rendermax.lua b/plugins/rendermax/rendermax.lua
index 762116c0b..4b19e2485 100644
--- a/plugins/rendermax/rendermax.lua
+++ b/plugins/rendermax/rendermax.lua
@@ -49,6 +49,8 @@ special.WATER=makeMaterialDef({0.5,0.5,0.8})
 special.FROZEN_LIQUID=makeMaterialDef({0.2,0.7,0.9}) -- ice
 special.AMBIENT=makeMaterialDef({0.85,0.85,0.85}) --ambient fog
 special.CURSOR=makeMaterialDef({1,1,1},{0.96,0.84,0.03},11, {"flicker"})
+special.CITIZEN=makeMaterialDef(nil,{0.80,0.80,0.90},6)
+special.LevelDim=0.2 -- darkness. Do not set to 0
 --TODO dragonfire
 --TODO daylight
 --materials