diff --git a/code/game/src/assets.h b/code/game/src/assets.h
index caa311c..2a2e1de 100644
--- a/code/game/src/assets.h
+++ b/code/game/src/assets.h
@@ -1,36 +1,39 @@
-#pragma once
-#include "system.h"
-
-#define ASSET_INVALID 0xFF
-
-typedef enum {
-    // NOTE(zaklaus): entities
-    ASSET_PLAYER,
-    ASSET_THING,
-    
-    // NOTE(zaklaus): items
-    ASSET_DEMO_ICEMAKER,
-    
-    MAX_ASSETS,
-    FORCE_ASSET_UINT16 = UINT16_MAX
-} asset_id;
-
-typedef enum {
-    AKIND_TEXTURE,
-    AKIND_SOUND,
-    
-    FORCE_AKIND_UINT8 = UINT8_MAX
-} asset_kind;
-
-int32_t assets_setup(void);
-void assets_destroy(void);
-
-uint16_t assets_find(asset_id id);
-
-asset_kind assets_get_kind(uint16_t id);
-void *assets_get_snd(uint16_t id);
-void *assets_get_tex(uint16_t id);
-
-// NOTE(zaklaus): client only
-#define ASSET_SRC_RECT() ((Rectangle){0, 0, 64, 64})
-#define ASSET_DST_RECT(x,y) ((Rectangle){x, y, 64, 64})
+#pragma once
+#include "system.h"
+
+#define ASSET_INVALID 0xFF
+
+typedef enum {
+    // NOTE(zaklaus): Debug
+    ASSET_DEBUG_TILE,
+    
+    // NOTE(zaklaus): entities
+    ASSET_PLAYER,
+    ASSET_THING,
+    
+    // NOTE(zaklaus): items
+    ASSET_DEMO_ICEMAKER,
+    
+    MAX_ASSETS,
+    FORCE_ASSET_UINT16 = UINT16_MAX
+} asset_id;
+
+typedef enum {
+    AKIND_TEXTURE,
+    AKIND_SOUND,
+    
+    FORCE_AKIND_UINT8 = UINT8_MAX
+} asset_kind;
+
+int32_t assets_setup(void);
+void assets_destroy(void);
+
+uint16_t assets_find(asset_id id);
+
+asset_kind assets_get_kind(uint16_t id);
+void *assets_get_snd(uint16_t id);
+void *assets_get_tex(uint16_t id);
+
+// NOTE(zaklaus): client only
+#define ASSET_SRC_RECT() ((Rectangle){0, 0, 64, 64})
+#define ASSET_DST_RECT(x,y) ((Rectangle){x, y, 64, 64})
diff --git a/code/game/src/assets_list.c b/code/game/src/assets_list.c
index 5a272a3..29fe5b6 100644
--- a/code/game/src/assets_list.c
+++ b/code/game/src/assets_list.c
@@ -1,8 +1,12 @@
-#include "assets.h"
-
-static asset assets[] = {
-    {
-        .id = ASSET_DEMO_ICEMAKER,
-        .kind = AKIND_TEXTURE,
-    }
-};
+#include "assets.h"
+
+static asset assets[] = {
+    {
+        .id = ASSET_DEBUG_TILE,
+        .kind = AKIND_TEXTURE,
+    },
+    {
+        .id = ASSET_DEMO_ICEMAKER,
+        .kind = AKIND_TEXTURE,
+    }
+};
diff --git a/code/game/src/debug_replay.c b/code/game/src/debug_replay.c
index 42590e2..25ed262 100644
--- a/code/game/src/debug_replay.c
+++ b/code/game/src/debug_replay.c
@@ -197,6 +197,11 @@ void debug_replay_update(void) {
             i->swap = r->pkt.swap;
             i->swap_from = r->pkt.swap_from;
             i->swap_to = r->pkt.swap_to;
+            i->num_placements = r->pkt.placement_num;
+            for (uint8_t j = 0; j < i->num_placements; j++) {
+                i->placements_x[j] = r->pkt.placements[j].x;
+                i->placements_y[j] = r->pkt.placements[j].y;
+            }
         }break;
         case RPKIND_SPAWN_CAR: {
             ecs_entity_t e = vehicle_spawn();
diff --git a/code/game/src/gui/build_mode.c b/code/game/src/gui/build_mode.c
new file mode 100644
index 0000000..3caf28b
--- /dev/null
+++ b/code/game/src/gui/build_mode.c
@@ -0,0 +1,71 @@
+#include "camera.h"
+#include "item_placement.h"
+
+static bool build_submit_placements = false;
+static bool build_is_in_draw_mode = false;
+static uint8_t build_num_placements = 0;
+static item_placement build_placements[BUILD_MAX_PLACEMENTS] = {0};
+
+void buildmode_draw() {
+    if (inv_is_open) return;
+    camera cam = camera_get();
+    Vector2 mpos = GetMousePosition();
+    entity_view *e = game_world_view_active_get_entity(cam.ent_id);
+    if (!e) return;
+    float zoom = renderer_zoom_get();
+    mpos.x -= screenWidth/2.0f;
+    mpos.y -= screenHeight/2.0f;
+    cam.x += mpos.x*(1.0f/zoom);
+    cam.y += mpos.y*(1.0f/zoom);
+    cam.x = ((int32_t)cam.x / (int32_t)(WORLD_BLOCK_SIZE)) * WORLD_BLOCK_SIZE;
+    cam.y = ((int32_t)cam.y / (int32_t)(WORLD_BLOCK_SIZE)) * WORLD_BLOCK_SIZE;
+    cam.x += WORLD_BLOCK_SIZE/2.0f;
+    cam.y += WORLD_BLOCK_SIZE/2.0f;
+    
+    if (e->has_items && !e->inside_vehicle && e->items[e->selected_item].quantity > 0) {
+        if (IsMouseButtonDown(MOUSE_LEFT_BUTTON) && !build_is_in_draw_mode) {
+            build_is_in_draw_mode = true;
+            build_num_placements = 0;
+            
+            item_placement empty_placement = { .x = 0.0f, .y = 0.0f, .kind = -1 };
+            for (size_t i = 0; i < BUILD_MAX_PLACEMENTS; i++) {
+                zpl_memcopy(&build_placements[i], &empty_placement, zpl_size_of(item_placement));
+            }
+        }
+        
+        uint32_t qty = e->items[e->selected_item].quantity;
+        
+        if (build_is_in_draw_mode) {
+            for (size_t i = 0; i < BUILD_MAX_PLACEMENTS; i++) {
+                item_placement *it = &build_placements[i];
+                if (it->kind == -1) {
+                    it->x = (float)cam.x;
+                    it->y = (float)cam.y;
+                    it->kind = 0;
+                    build_num_placements++;
+                    break;
+                } else if (it->x == (float)cam.x && it->y == (float)cam.y) {
+                    break;
+                }
+            }
+            
+            build_num_placements = zpl_min(build_num_placements, qty);
+            
+            for (size_t i = 0; i < build_num_placements; i++) {
+                item_placement *it = &build_placements[i];
+                renderer_draw_single(it->x, it->y, ASSET_DEBUG_TILE, ColorAlpha(BLUE, 0.4f));
+            }
+            
+            if (IsMouseButtonPressed(MOUSE_RIGHT_BUTTON)) {
+                build_is_in_draw_mode = false;
+            }
+            
+            if (IsMouseButtonReleased(MOUSE_LEFT_BUTTON)) {
+                build_submit_placements = true;
+                build_is_in_draw_mode = false;
+            }
+        }
+        
+        renderer_draw_single(cam.x, cam.y, ASSET_DEBUG_TILE, ColorAlpha(BLUE, 0.4f));
+    }
+}
\ No newline at end of file
diff --git a/code/game/src/gui/inventory.c b/code/game/src/gui/inventory.c
index c93a423..da7886f 100644
--- a/code/game/src/gui/inventory.c
+++ b/code/game/src/gui/inventory.c
@@ -24,7 +24,9 @@ void inventory_draw() {
         inv_is_open = !inv_is_open;
     }
     
-    if (!inv_is_open) return;
+    if (!inv_is_open) {
+        return;
+    }
     
     float sx = screenWidth/2.0f + 128;
     float sy = screenHeight/2.0f - 96;
diff --git a/code/game/src/item_placement.h b/code/game/src/item_placement.h
new file mode 100644
index 0000000..f2fb961
--- /dev/null
+++ b/code/game/src/item_placement.h
@@ -0,0 +1,10 @@
+#pragma once
+
+#define BUILD_MAX_PLACEMENTS 20
+
+typedef struct {
+    float x;
+    float y;
+    float rot;
+    int16_t kind;
+} item_placement;
diff --git a/code/game/src/items.c b/code/game/src/items.c
index e372816..5b659ae 100644
--- a/code/game/src/items.c
+++ b/code/game/src/items.c
@@ -36,6 +36,7 @@ void item_use(ecs_world_t *ecs, ItemDrop *it, Position p) {
     (void)ecs;
     uint16_t item_id = item_find(it->kind);
     item_desc *desc = &items[item_id];
+    if (it->quantity <= 0) return;
     switch (item_get_usage(item_id)) {
         case UKIND_PLACE:{
             world_block_lookup l = world_block_from_realpos(p.x, p.y);
diff --git a/code/game/src/items.h b/code/game/src/items.h
index 2436b4e..c3d0a49 100644
--- a/code/game/src/items.h
+++ b/code/game/src/items.h
@@ -13,6 +13,8 @@ typedef enum {
 
 typedef enum {
     UKIND_PLACE,
+    UKIND_PLACE_ITEM,
+    UKIND_END_PLACE,
 } item_usage;
 
 typedef struct {
diff --git a/code/game/src/packets/pkt_send_keystate.c b/code/game/src/packets/pkt_send_keystate.c
index 47aa201..25cda91 100644
--- a/code/game/src/packets/pkt_send_keystate.c
+++ b/code/game/src/packets/pkt_send_keystate.c
@@ -20,6 +20,8 @@ pkt_desc pkt_send_keystate_desc[] = {
     { PKT_UINT(pkt_send_keystate, swap) },
     { PKT_UINT(pkt_send_keystate, swap_from) },
     { PKT_UINT(pkt_send_keystate, swap_to) },
+    { PKT_UINT(pkt_send_keystate, placement_num) },
+    { PKT_ARRAY(pkt_send_keystate, placements) },
     { PKT_END },
 };
 
@@ -57,6 +59,11 @@ int32_t pkt_send_keystate_handler(pkt_header *header) {
         i->swap = table.swap;
         i->swap_from = zpl_clamp(table.swap_from, 0, ITEMS_INVENTORY_SIZE-1);
         i->swap_to = zpl_clamp(table.swap_to, 0, ITEMS_INVENTORY_SIZE-1);
+        i->num_placements = zpl_clamp(table.placement_num, 0, BUILD_MAX_PLACEMENTS);
+        for (uint8_t j = 0; j < i->num_placements; j++) {
+            i->placements_x[j] = table.placements[j].x;
+            i->placements_y[j] = table.placements[j].y;
+        }
         debug_replay_record_keystate(table);
     }
     
diff --git a/code/game/src/packets/pkt_send_keystate.h b/code/game/src/packets/pkt_send_keystate.h
index 89811dd..1772a63 100644
--- a/code/game/src/packets/pkt_send_keystate.h
+++ b/code/game/src/packets/pkt_send_keystate.h
@@ -1,6 +1,7 @@
 #pragma once
 #include "system.h"
 #include "packet_utils.h"
+#include "item_placement.h"
 
 typedef struct {
     float x;
@@ -15,6 +16,10 @@ typedef struct {
     uint8_t swap;
     uint8_t swap_from;
     uint8_t swap_to;
+    
+    // TODO(zaklaus): build mode
+    uint8_t placement_num;
+    item_placement placements[BUILD_MAX_PLACEMENTS];
 } pkt_send_keystate;
 
 typedef pkt_send_keystate game_keystate_data;
diff --git a/code/game/src/platform_raylib.c b/code/game/src/platform_raylib.c
index d053243..4a1814a 100644
--- a/code/game/src/platform_raylib.c
+++ b/code/game/src/platform_raylib.c
@@ -23,6 +23,7 @@ static bool request_shutdown;
 
 // NOTE(zaklaus): add-ins
 #include "gui/inventory.c"
+#include "gui/build_mode.c"
 
 void platform_init() {
     InitWindow(screenWidth, screenHeight, "eco2d");
@@ -106,6 +107,13 @@ void platform_input() {
             .swap_to = inv_swap_to,
         };
         
+        if (build_submit_placements) {
+            build_submit_placements = false;
+            
+            data.placement_num = build_num_placements;
+            zpl_memcopy(data.placements, build_placements, build_num_placements*zpl_size_of(item_placement));
+        }
+        
         game_action_send_keystate(&data);
     }
     
@@ -151,6 +159,7 @@ void platform_render() {
         {
             // NOTE(zaklaus): add-ins
             inventory_draw();
+            buildmode_draw();
         }
         display_conn_status();
         debug_draw();
diff --git a/code/game/src/renderer_3d.c b/code/game/src/renderer_3d.c
index 4948c21..27b6330 100644
--- a/code/game/src/renderer_3d.c
+++ b/code/game/src/renderer_3d.c
@@ -133,4 +133,15 @@ void renderer_shutdown_3d(void) {
 
 void renderer_debug_draw_3d(void) {
     
-}
\ No newline at end of file
+}
+
+float renderer_zoom_get_3d(void) {
+    return 1.0f;
+}
+
+void renderer_draw_single_3d(float x, float y, asset_id id, Color color) {
+    (void)color;
+    BeginMode3D(render_camera_3d);
+    EcoDrawCube((Vector3){x, 15.0f, y}, 16, 16, 16, 0.0f, PINK);
+    EndMode3D();
+}
diff --git a/code/game/src/renderer_bridge.c b/code/game/src/renderer_bridge.c
index dfe169c..37d11e0 100644
--- a/code/game/src/renderer_bridge.c
+++ b/code/game/src/renderer_bridge.c
@@ -6,7 +6,9 @@
 #define renderer_init renderer_init_v0
 #define renderer_shutdown renderer_shutdown_v0
 #define renderer_draw renderer_draw_v0
+#define renderer_draw_single renderer_draw_single_v0
 #define renderer_debug_draw renderer_debug_draw_v0
+#define renderer_zoom_get renderer_zoom_get_v0
 void renderer_switch(int kind) {}
 #elif GFX_KIND == 1
 // NOTE(zaklaus): renderer_3d
@@ -14,7 +16,9 @@ void renderer_switch(int kind) {}
 #define renderer_init renderer_init_3d
 #define renderer_shutdown renderer_shutdown_3d
 #define renderer_draw renderer_draw_3d
+#define renderer_draw_single renderer_draw_single_3d
 #define renderer_debug_draw renderer_debug_draw_3d
+#define renderer_zoom_get renderer_zoom_get_3d
 void renderer_switch(int kind) {}
 #elif GFX_KIND == 2
 #include "renderer_3d.c"
@@ -66,6 +70,29 @@ void renderer_debug_draw(void) {
     }
 }
 
+float renderer_zoom_get(void) {
+    switch (gfx_kind) {
+        case 0:{
+            return renderer_zoom_get_v0();
+        }break;
+        case 1:{
+            return renderer_zoom_get_3d();
+        }break;
+    }
+    return 1.0f;
+}
+
+void renderer_draw_single(float x, float y, asset_id id, Color color) {
+    switch (gfx_kind) {
+        case 0:{
+            renderer_draw_single_v0(x, y, id, color);
+        }break;
+        case 1:{
+            renderer_draw_single_3d(x, y, id, color);
+        }break;
+    }
+}
+
 void renderer_bake_chunk(uint64_t key, entity_view * data) {
     if (data->kind != EKIND_CHUNK) return;
     world_view *view = game_world_view_get_active();
diff --git a/code/game/src/renderer_v0.c b/code/game/src/renderer_v0.c
index 0d34045..8f5f648 100644
--- a/code/game/src/renderer_v0.c
+++ b/code/game/src/renderer_v0.c
@@ -127,6 +127,10 @@ void renderer_draw_v0(void) {
     EndMode2D();
 }
 
+float renderer_zoom_get_v0(void) {
+    return render_camera.zoom;
+}
+
 void renderer_init_v0(void) {
     render_camera.target = (Vector2){0.0f,0.0f};
     render_camera.offset = (Vector2){screenWidth >> 1, screenHeight >> 1};
@@ -191,4 +195,15 @@ void renderer_debug_draw_v0(void) {
     }
     
     EndMode2D();
-}
\ No newline at end of file
+}
+
+void renderer_draw_single_v0(float x, float y, asset_id id, Color color) {
+    BeginMode2D(render_camera);
+    
+    x -= 32.0f;
+    y -= 32.0f;
+    
+    DrawTexturePro(GetSpriteTexture2D(assets_find(id)), ASSET_SRC_RECT(), ASSET_DST_RECT(x,y), (Vector2){0.5f,0.5f}, 0.0f, color);
+    
+    EndMode2D();
+}
diff --git a/code/modules/modules/components.h b/code/modules/modules/components.h
index 1a6601c..9fe981a 100644
--- a/code/modules/modules/components.h
+++ b/code/modules/modules/components.h
@@ -52,6 +52,11 @@ ECS_STRUCT(Input, {
                uint8_t swap;
                uint8_t swap_from;
                uint8_t swap_to;
+               
+               // NOTE(zaklaus): build mode
+               uint8_t num_placements;
+               float placements_x[20];
+               float placements_y[20];
            });
 
 ECS_STRUCT(ClientInfo, {
diff --git a/code/modules/source/system_items.c b/code/modules/source/system_items.c
index dce0a01..5b87345 100644
--- a/code/modules/source/system_items.c
+++ b/code/modules/source/system_items.c
@@ -182,10 +182,20 @@ void UseItem(ecs_iter_t *it) {
     Inventory *inv = ecs_column(it, Inventory, 3);
     
     for (int i = 0; i < it->count; i++) {
-        if (!in[i].use) continue;
+        if (!in[i].use && !in[i].num_placements) continue;
         
         ItemDrop *item = &inv[i].items[in[i].selected_item];
         if (!item || item->quantity <= 0) continue;
-        item_use(it->world, item, p[i]);
+        uint16_t item_id = item_find(item ->kind);
+        item_usage usage = item_get_usage(item_id);
+        
+        if (in[i].use && usage > UKIND_END_PLACE)
+            item_use(it->world, item, p[i]);
+        else if (in[i].num_placements > 0 && usage < UKIND_END_PLACE) {
+            for (size_t j = 0; j < in[i].num_placements; j++) {
+                Position pos = {.x = in[i].placements_x[j], .y = in[i].placements_y[j]};
+                item_use(it->world, item, pos);
+            }
+        }
     }
 }
\ No newline at end of file
diff --git a/screenshot000.png b/screenshot000.png
new file mode 100644
index 0000000..157d614
Binary files /dev/null and b/screenshot000.png differ