- merged vid_renderer, swtruecolor and r_polyrender into one CVAR to reduce menu clutter.

- with renderers freely switchable, some shortcuts in the 3D floor code had to be removed, because now the hardware renderer can get FF_THISINSIDE-flagged 3D floors.
- changed handling of attenuated lights in the legacy renderer to be adjusted when being rendered instead of when being spawned. For the software renderer the light needs to retain its original values.

src/d_main.cpp

@@ -703,13 +703,6 @@ void D_Display ()
 	// [RH] change the screen mode if needed
 	if (setmodeneeded)
 	{
-		int oldrenderer;
-		extern int currentrenderer;
-		EXTERN_CVAR(Int, vid_renderer)
-		oldrenderer = vid_renderer; // [SP] Save pending vid_renderer setting (hack)
-		if (currentrenderer != vid_renderer)
-			vid_renderer = currentrenderer;
-
 		// Change screen mode.
 		if (Video->SetResolution (NewWidth, NewHeight, NewBits))
 		{
@@ -728,7 +721,6 @@ void D_Display ()
 			// Reset the mouse cursor in case the bit depth changed
 			vid_cursor.Callback();
 		}
-		vid_renderer = oldrenderer; // [SP] Restore pending vid_renderer setting
 	}
 
 	// change the view size if needed