diff --git a/src/map.c b/src/map.c
index ac086487e4..f654935c4a 100644
--- a/src/map.c
+++ b/src/map.c
@@ -138,7 +138,9 @@ void map_update_tile_pointers()
 
 /**
  * Return the absolute height of an element, given its (x,y) coordinates
- * 
+ *  ax: x
+ *  cx: y
+ *  dx: return
  *  rct2: 0x00662783
  */
 int map_element_height(int x, int y)
diff --git a/src/sprite.c b/src/sprite.c
index c2c80cb5dd..96dbdc4596 100644
--- a/src/sprite.c
+++ b/src/sprite.c
@@ -104,4 +104,48 @@ void reset_0x69EBE4(){
 			spr->unknown.var_02 = ax;
 		}
 	}
+}
+
+/*
+* rct2: 0x0069EC6B
+* bl: unclear what this does
+*/
+rct_sprite *create_sprite(uint8 bl)
+{
+	int ecx = 0xA;
+
+	if ((bl & 2 != 0))
+	{
+		// 69EC96;
+		uint16 cx = 0x12C - RCT2_GLOBAL(0x13573CE, uint16);
+		if (cx >= RCT2_GLOBAL(0x13573C8, uint16))
+		{
+			return NULL;
+		}
+
+		ecx = 6;
+	}
+	else if (RCT2_GLOBAL(0x13573C8, uint16) <= 0)
+	{
+		return NULL;
+	}
+
+	rct_unk_sprite *sprite = &g_sprite_list[RCT2_GLOBAL(RCT2_ADDRESS_SPRITES_NEXT_INDEX, uint16)];
+
+	RCT2_CALLPROC_X(0x0069ED0B, 0, 0, ecx, 0, (int)sprite, 0, 0);
+
+	sprite->x = SPRITE_LOCATION_NULL;
+	sprite->y = SPRITE_LOCATION_NULL;
+	sprite->z = 0;
+	sprite->name_string_idx = 0;
+	sprite->var_14 = 0x10;
+	sprite->pad_09 = 0x14;
+	sprite->var_15 = 0x8;
+	sprite->pad_0C[0] = 0x0;
+	sprite->var_16 = SPRITE_LOCATION_NULL;
+
+	sprite->var_02 = RCT2_GLOBAL(0xF3EF60, uint16);
+	RCT2_GLOBAL(0xF3EF60, uint16) = sprite->sprite_index;
+
+	return sprite;
 }
\ No newline at end of file
diff --git a/src/sprite.h b/src/sprite.h
index 701d448cbc..81f6955956 100644
--- a/src/sprite.h
+++ b/src/sprite.h
@@ -49,12 +49,15 @@ typedef struct {
 	sint16 x;						// 0x0E
 	sint16 y;						// 0x10
 	sint16 z;						// 0x12
-	uint16 pad_14;
+	uint8 var_14;					// 0x14
+	uint8 var_15;					// 0x15
 	sint16 var_16; //x related
 	sint16 var_18; //y related
 	sint16 var_1A; //x related
 	sint16 var_1C; //y related
-	uint8  sprite_direction; //direction of sprite?
+	uint8  sprite_direction; //direction of sprite? 0x1e
+	uint8 pad_1F[3]; // 0x1f
+	uint16 name_string_idx;			// 0x22
 } rct_unk_sprite;
 
 typedef struct {
@@ -86,6 +89,7 @@ typedef union {
 extern rct_sprite* g_sprite_list;
 
 void create_balloon(int x, int y, int z, int colour);
+rct_sprite *create_sprite(uint8 bl);
 void reset_sprite_list();
 void reset_0x69EBE4();
 
diff --git a/src/staff.c b/src/staff.c
index 1e0bc041cb..4fe6e6eb68 100644
--- a/src/staff.c
+++ b/src/staff.c
@@ -111,14 +111,12 @@ void game_command_hire_new_staff_member(int* eax, int* ebx, int* ecx, int* edx,
 
 	int newStaffId = i;
 
-	int _eax, _ebx, _ecx = _cx, _edx, _esi, _edi, _ebp;
-	_esi = 0;
+	int _eax, _ebx, _ecx = _cx, _edx, _edi, _ebp;
 	_ebx = _bl;
-	RCT2_CALLFUNC_X(0x0069EC6B, &_eax, &_ebx, &_ecx, &_edx, &_esi, &_edi, &_ebp);
-	rct_peep* newPeep = (rct_peep*)_esi;
 
-	//if ((newPeep = create_peep_sprite(_bl)) == NULL)
-	if (_esi == 0)
+	rct_peep* newPeep = create_sprite(_bl);
+
+	if (newPeep == NULL)
 	{
 		*ebx = 0x80000000;
 		RCT2_GLOBAL(RCT2_ADDRESS_GAME_COMMAND_ERROR_TEXT, uint16) = STR_TOO_MANY_PEOPLE_IN_GAME;
diff --git a/src/viewport.c b/src/viewport.c
index e47bc4f653..d39bf92a8d 100644
--- a/src/viewport.c
+++ b/src/viewport.c
@@ -113,19 +113,19 @@ void center_2d_coordinates(int x, int y, int z, int* out_x, int* out_y, rct_view
 	switch (RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_ROTATION, uint32)){
 	case 0:
 		x = y - x;
-		y = y / 2 + start_x / 2 - z;
+		y = (y + start_x) / 2 - z;
 		break;
 	case 1:
 		x = -y - x;
-		y = y / 2 - start_x / 2 - z;
+		y = (y - start_x) / 2 - z;
 		break;
 	case 2:
 		x = -y + x;
-		y = -y / 2 - start_x / 2 - z;
+		y = (-y - start_x) / 2 - z;
 		break;
 	case 3:
 		x = y + x;
-		y = -y / 2 + start_x / 2 - z;
+		y = (-y + start_x) / 2 - z;
 		break;
 	}
 
@@ -221,8 +221,8 @@ void viewport_update_pointers()
 	*vp = NULL;
 }
 
-void sub_689174(sint16* x, sint16* y, uint8 curr_rotation){
-	//RCT2_CALLFUNC_X(0x00689174, (int*)&x, (int*)&y, &ecx, &curr_rotation, (int*)&window, (int*)&viewport, &ebp);
+void sub_689174(sint16* x, sint16* y, sint16 *z, uint8 curr_rotation){
+	//RCT2_CALLFUNC_X(0x00689174, (int*)&x, (int*)&y, (int*)&z, &curr_rotation, (int*)&window, (int*)&viewport, &ebp);
 
 	sint16 start_x = *x;
 	sint16 start_y = *y;
@@ -262,6 +262,7 @@ void sub_689174(sint16* x, sint16* y, uint8 curr_rotation){
 		}
 		break;
 	}
+	*z = height;
 }
 
 /**
@@ -296,11 +297,12 @@ void viewport_update_position(rct_window *window)
 
 	sint16 x = viewport->view_width / 2 + window->saved_view_x;
 	sint16 y = viewport->view_height / 2 + window->saved_view_y;
+	sint16 z;
 
 	int curr_rotation = RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_ROTATION, uint32);
-	sub_689174(&x, &y, curr_rotation);
+	sub_689174(&x, &y, &z, curr_rotation);
 	
-	RCT2_CALLPROC_X(0x006E7A15, x, y, 0, 0, (int)window, (int)viewport, 0);
+	RCT2_CALLPROC_X(0x006E7A15, x, y, z, 0, (int)window, (int)viewport, 0);
 
 	//Clamp to the map minimum value
 	int at_map_edge = 0;
diff --git a/src/viewport.h b/src/viewport.h
index 9b709f8d03..dfbcfb8c5c 100644
--- a/src/viewport.h
+++ b/src/viewport.h
@@ -47,11 +47,14 @@ enum {
 extern rct_viewport* g_viewport_list;
 
 void viewport_init_all();
+void center_2d_coordinates(int x, int y, int z, int* out_x, int* out_y, rct_viewport* viewport);
 void viewport_create(rct_window *w, int x, int y, int width, int height, int zoom, int center_x, int center_y, int center_z, char flags, sint16 sprite);
 void viewport_update_pointers();
 void viewport_update_position(rct_window *window);
 void viewport_render(rct_drawpixelinfo *dpi, rct_viewport *viewport, int left, int top, int right, int bottom);
 
+void sub_689174(sint16* x, sint16* y, sint16 *z, uint8 curr_rotation);
+
 void screen_pos_to_map_pos(short *x, short *y);
 
 void show_gridlines();
diff --git a/src/window.c b/src/window.c
index 4351d90d1a..af22ebfc4a 100644
--- a/src/window.c
+++ b/src/window.c
@@ -21,7 +21,9 @@
 #include <string.h>
 #include "addresses.h"
 #include "audio.h"
+#include "game.h"
 #include "gfx.h"
+#include "map.h"
 #include "osinterface.h"
 #include "rct2.h"
 #include "widget.h"
@@ -963,7 +965,49 @@ void window_scroll_to_location(rct_window *w, int x, int y, int z)
  */
 void window_rotate_camera(rct_window *w)
 {
-	RCT2_CALLPROC_X(0x0068881A, 0, 0, 0, 0, (int)w, 0, 0);
+	//RCT2_CALLPROC_X(0x0068881A, 0, 0, 0, 0, (int)w, 0, 0);
+
+	rct_viewport *viewport = w->viewport;
+	if (viewport == NULL)
+		return;
+
+	sint16 x = (viewport->width >> 1) + viewport->x;
+	sint16 y = (viewport->height >> 1) + viewport->y;
+	sint16 z;
+
+	uint8 rot = RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_ROTATION, uint8);
+
+	int ecx, edx, esi, edi = (int)viewport, ebp;
+	//has something to do with checking if middle of the viewport is obstructed
+	RCT2_CALLFUNC_X(0x00688972, (int*)&x, (int*)&y, &ecx, &edx, &esi, &edi, &ebp);
+	rct_viewport *other = (rct_viewport*)edi;
+
+	// other != viewport probably triggers on viewports in ride or guest window?
+	// x is 0x8000 if middle of viewport is obstructed by another window?
+	if (x == (sint16)SPRITE_LOCATION_NULL || other != viewport){
+		x = (viewport->view_width >> 1) + viewport->view_x;
+		y = (viewport->view_height >> 1) + viewport->view_y;
+
+		sub_689174(&x, &y, &z, rot);
+	} else {
+		z = map_element_height(x, y);
+	}
+
+	RCT2_GLOBAL(RCT2_ADDRESS_CURRENT_ROTATION, uint32) = (rot + 1) % 4;
+
+	int new_x, new_y;
+	center_2d_coordinates(x, y, z, &new_x, &new_y, viewport);
+
+	w->saved_view_x = new_x;
+	w->saved_view_y = new_y;
+	viewport->view_x = new_x;
+	viewport->view_y = new_y;
+
+	window_invalidate(w);
+
+	RCT2_CALLPROC_EBPSAFE(0x00688956);
+
+	sub_0x0069E9A7();
 }
 
 /**