Only run view update hack in no-render mode

src/p_tick.c

@@ -25,6 +25,7 @@
 #include "i_system.h" // I_GetPreciseTime
 #include "r_main.h"
 #include "r_fps.h"
+#include "i_video.h" // rendermode
 
 // Object place
 #include "m_cheat.h"
@@ -772,30 +773,32 @@ void P_Ticker(boolean run)
 
 	if (run)
 	{
-		player_t *player1;
-
 		R_UpdateLevelInterpolators();
 		R_UpdateViewInterpolation();
 
 		// Hack: ensure newview is assigned every tic.
 		// Ensures view interpolation is T-1 to T in poor network conditions
 		// We need a better way to assign view state decoupled from game logic
-		player1 = &players[displayplayer];
-		if (player1->mo && skyboxmo[0] && cv_skybox.value)
+		if (rendermode != render_none)
 		{
-			R_SkyboxFrame(player1);
-		}
-		R_SetupFrame(player1);
+			player_t *player1 = &players[displayplayer];
+			if (player1->mo && skyboxmo[0] && cv_skybox.value)
+			{
+				R_SkyboxFrame(player1);
+			}
+			R_SetupFrame(player1);
 
-		if (splitscreen)
-		{
-			player_t *player2 = &players[secondarydisplayplayer];
-			if (player2->mo && skyboxmo[0] && cv_skybox.value)
+			if (splitscreen)
 			{
-				R_SkyboxFrame(player2);
+				player_t *player2 = &players[secondarydisplayplayer];
+				if (player2->mo && skyboxmo[0] && cv_skybox.value)
+				{
+					R_SkyboxFrame(player2);
+				}
+				R_SetupFrame(player2);
 			}
-			R_SetupFrame(player2);
 		}
+		
 	}
 
 	P_MapEnd();