- fixed: screen->FrameTime should use an adjusted frame start time

src/d_main.cpp

@@ -781,7 +781,7 @@ void D_Display ()
 
 
 	{
-		screen->FrameTime = I_msTime();
+		screen->FrameTime = I_msTimeFS();
 		TexMan.UpdateAnimations(screen->FrameTime);
 		R_UpdateSky(screen->FrameTime);
 		switch (gamestate)

src/i_time.cpp

@@ -164,6 +164,11 @@ uint64_t I_msTime()
 	return NSToMS(I_nsTime());
 }
 
+uint64_t I_msTimeFS() // from "start"
+{
+	return NSToMS(I_nsTime() - FirstFrameStartTime);
+}
+
 int I_GetTime()
 {
 	return NSToTic(CurrentFrameStartTime - FirstFrameStartTime);

src/i_time.h

@@ -22,5 +22,8 @@ void I_FreezeTime(bool frozen);
 // [RH] Returns millisecond-accurate time
 uint64_t I_msTime();
 
+// [SP] Returns millisecond-accurate time from start
+uint64_t I_msTimeFS();
+
 // Nanosecond-accurate time
 uint64_t I_nsTime();