diff --git a/source/build/include/build.h b/source/build/include/build.h
index bf2305fe1..25a285120 100644
--- a/source/build/include/build.h
+++ b/source/build/include/build.h
@@ -1369,6 +1369,8 @@ extern int32_t gltexmaxsize;
 void gltexapplyprops (void);
 void texcache_invalidate(void);
 
+extern int32_t benchmarkScreenshot;
+
 # ifdef USE_GLEXT
 extern int32_t r_detailmapping;
 extern int32_t r_glowmapping;
diff --git a/source/build/src/engine.cpp b/source/build/src/engine.cpp
index 432c34df9..dbd359661 100644
--- a/source/build/src/engine.cpp
+++ b/source/build/src/engine.cpp
@@ -130,6 +130,8 @@ static uint32_t *distrecip;
 static int32_t *lookups = NULL;
 static int32_t beforedrawrooms = 1;
 
+int32_t benchmarkScreenshot = 0;
+
 static int32_t oxdimen = -1, oviewingrange = -1, oxyaspect = -1;
 
 // r_usenewaspect is the cvar, newaspect_enable to trigger the new behaviour in the code
@@ -10158,6 +10160,12 @@ void videoNextPage(void)
         }
         videoEndDrawing();   //}}}
 
+        if (benchmarkScreenshot)
+        {
+            videoCaptureScreen("reference0000.png", 0);
+            benchmarkScreenshot = 0;
+        }
+
         OSD_Draw();
         videoShowFrame(0);
 
diff --git a/source/duke3d/src/actors.cpp b/source/duke3d/src/actors.cpp
index 66308d69d..40a452758 100644
--- a/source/duke3d/src/actors.cpp
+++ b/source/duke3d/src/actors.cpp
@@ -7560,7 +7560,7 @@ ACTOR_STATIC void G_MoveEffectors(void)   //STATNUM 3
 
         case SE_27_DEMO_CAM:
         {
-            if (pSprite->extra < 1 && (ud.recstat == 0 || !ud.democams)) break;
+            if (pSprite->extra < 1 && (ud.recstat == 0 || !ud.democams) && g_BenchmarkMode == BENCHMARKMODE_OFF) break;
 
             if (klabs(pSprite->extra) == 2)
             {
@@ -7606,6 +7606,9 @@ ACTOR_STATIC void G_MoveEffectors(void)   //STATNUM 3
                             pData[8] = (((int32_t) getangle(-ksqrt(cameraDirection.x*cameraDirection.x+cameraDirection.y*cameraDirection.y), cameraDirection.z)*(400.f/1024.f)))-300;
                         }
                     }
+
+                    //if we are benchmarking, take a screenshot at each waypoint (camera start point/locator)
+                    benchmarkScreenshot = g_BenchmarkMode == BENCHMARKMODE_GENERATE_REFERENCE;
                 }
                 if (pSprite->owner == -1)
                 {
diff --git a/source/duke3d/src/game.cpp b/source/duke3d/src/game.cpp
index d47c160ef..61e348b88 100644
--- a/source/duke3d/src/game.cpp
+++ b/source/duke3d/src/game.cpp
@@ -90,6 +90,8 @@ char boardfilename[BMAX_PATH] = {0}, currentboardfilename[BMAX_PATH] = {0};
 int32_t voting = -1;
 int32_t vote_map = -1, vote_episode = -1;
 
+int32_t g_BenchmarkMode = BENCHMARKMODE_OFF;
+
 int32_t g_Debug = 0;
 
 const char *defaultrtsfilename[GAMECOUNT] = { "DUKE.RTS", "NAM.RTS", "NAPALM.RTS", "WW2GI.RTS" };
diff --git a/source/duke3d/src/game.h b/source/duke3d/src/game.h
index 6fb7a42d0..dddab807b 100644
--- a/source/duke3d/src/game.h
+++ b/source/duke3d/src/game.h
@@ -116,6 +116,12 @@ enum {
     STATUSBAR_NOMODERN  = 0x00000040,
 };
 
+enum {
+    BENCHMARKMODE_OFF = 0x0,
+    BENCHMARKMODE_PERFORMANCE = 0x1,
+    BENCHMARKMODE_GENERATE_REFERENCE = 0x2,
+};
+
 void A_DeleteSprite(int spriteNum);
 
 static inline int32_t G_GetLogoFlags(void)
@@ -312,6 +318,7 @@ extern char ror_protectedsectors[MAXSECTORS];
 
 extern float r_ambientlight;
 
+extern int32_t g_BenchmarkMode;
 extern int32_t g_Debug;
 extern int32_t g_Shareware;
 #if !defined LUNATIC
diff --git a/source/duke3d/src/osdcmds.cpp b/source/duke3d/src/osdcmds.cpp
index e39f05d40..0e7a26d97 100644
--- a/source/duke3d/src/osdcmds.cpp
+++ b/source/duke3d/src/osdcmds.cpp
@@ -1552,6 +1552,8 @@ int32_t registerosdcommands(void)
 {
     static osdcvardata_t cvars_game[] =
     {
+        { "benchmarkmode", "Set the benchmark mode (0: off, 1: performance test, 2: generate reference screenshots for correctness testing)", (void *) &g_BenchmarkMode, CVAR_INT|CVAR_NOSAVE, 0, 2 },
+
         { "crosshair", "enable/disable crosshair", (void *)&ud.crosshair, CVAR_BOOL, 0, 1 },
 
         { "cl_autoaim", "enable/disable weapon autoaim", (void *)&ud.config.AutoAim, CVAR_INT|CVAR_MULTI, 0, 3 },