diff --git a/messages.js b/messages.js
index 36e8032..09515ce 100644
--- a/messages.js
+++ b/messages.js
@@ -602,16 +602,18 @@ module.exports = {
 					type: "array",
 					items: { type: "string" },
 				},
+				layer: { type: "string" }, // optional, defaults to "" for entities
 			},
 		};
-		constructor(type, data, position, size) {
+		constructor(type, data, position, size, layer = "") {
 			this.type = type;
 			this.data = data;
 			this.position = position;
 			this.size = size;
+			this.layer = layer;
 		}
 		static fromJSON(json) {
-			return new this(json.type, json.data, json.position, json.size);
+			return new this(json.type, json.data, json.position, json.size, json.layer);
 		}
 	},
 	RefreshTileData: class RefreshTileData {
diff --git a/module/gridworld.lua b/module/gridworld.lua
index da89eb6..881a506 100644
--- a/module/gridworld.lua
+++ b/module/gridworld.lua
@@ -67,6 +67,7 @@ gridworld.events[clusterio_api.events.on_server_startup] = function()
 			added_entities_to_update = nil,
 			removed_entities_to_update = nil,
 			entity_registrations = {},
+			tiles_to_update = nil,
 		}
 	end
 	if global.gridworld.map.entity_registrations == nil then
@@ -247,6 +248,31 @@ gridworld.events[defines.events.on_tick] = function(event)
 		worldgen.events.on_tick(event)
 	end
 end
+gridworld.events[defines.events.on_player_built_tile] = function(event)
+	if not global.gridworld.lobby_server then
+		map.events.on_player_built_tile(event)
+	end
+end
+gridworld.events[defines.events.on_robot_built_tile] = function(event)
+	if not global.gridworld.lobby_server then
+		map.events.on_robot_built_tile(event)
+	end
+end
+gridworld.events[defines.events.on_player_mined_tile] = function(event)
+	if not global.gridworld.lobby_server then
+		map.events.on_player_mined_tile(event)
+	end
+end
+gridworld.events[defines.events.on_robot_mined_tile] = function(event)
+	if not global.gridworld.lobby_server then
+		map.events.on_robot_mined_tile(event)
+	end
+end
+gridworld.events[defines.events.script_raised_set_tiles] = function(event)
+	if not global.gridworld.lobby_server then
+		map.events.script_raised_set_tiles(event)
+	end
+end
 gridworld.on_nth_tick = {}
 gridworld.on_nth_tick[37] = function()
 	if not global.gridworld.lobby_server then
diff --git a/module/map/dump_mapview.lua b/module/map/dump_mapview.lua
index 3db2ee2..ca30a20 100644
--- a/module/map/dump_mapview.lua
+++ b/module/map/dump_mapview.lua
@@ -27,6 +27,7 @@ local function dump_mapview(position_a, position_b)
 		position = position_a,
 		size = CHUNK_SIZE,
 		data = table.concat(map_data, ";"),
+		layer = "tiles_"
 	})
 end
 -- dump_mapview(game.player.position, {x = game.player.position.x + 128, y = game.player.position.y + 128})
diff --git a/module/map/dump_tiles.lua b/module/map/dump_tiles.lua
new file mode 100644
index 0000000..06abc5a
--- /dev/null
+++ b/module/map/dump_tiles.lua
@@ -0,0 +1,28 @@
+--[[
+	Dump changed tiles
+
+	Unlike dump_mapview, this one dumps an array of single tiles. This is less
+	space efficient than the chunked format for normal exports, but nmore
+	efficient for many small updates such as what happens when robots build concrete.
+]]
+
+local clusterio_api = require("modules/clusterio/api")
+
+local function dump_tiles(tiles)
+	local map_data = {}
+	for _, tilePosition in pairs(tiles) do
+		local tile = game.surfaces[1].get_tile(tilePosition)
+		local map_color = tile.prototype.map_color
+		table.insert(map_data, tilePosition.x)
+		table.insert(map_data, tilePosition.y)
+		table.insert(map_data, string.format("%02x%02x%02x%02x", map_color.r, map_color.g, map_color.b, map_color.a))
+	end
+
+	clusterio_api.send_json("gridworld:tile_data", {
+		type = "pixels",
+		data = table.concat(map_data, ";"),
+		layer = "tiles_",
+	})
+end
+
+return dump_tiles
diff --git a/module/map/events/on_nth_tick.lua b/module/map/events/on_nth_tick.lua
index f5556e2..29bf126 100644
--- a/module/map/events/on_nth_tick.lua
+++ b/module/map/events/on_nth_tick.lua
@@ -1,4 +1,5 @@
 local dump_entities = require("modules/gridworld/map/dump_entities")
+local dump_tiles = require("modules/gridworld/map/dump_tiles")
 
 local function on_nth_tick()
 	if global.gridworld.map.added_entities_to_update or (global.gridworld.map.removed_entities_to_update and #global.gridworld.map.removed_entities_to_update > 0) then
@@ -6,6 +7,10 @@ local function on_nth_tick()
 		global.gridworld.map.added_entities_to_update = nil
 		global.gridworld.map.removed_entities_to_update = {}
 	end
+	if global.gridworld.map.tiles_to_update ~= nil then
+		dump_tiles(global.gridworld.map.tiles_to_update)
+		global.gridworld.map.tiles_to_update = nil
+	end
 end
 
 return on_nth_tick
diff --git a/module/map/events/on_tile_changed.lua b/module/map/events/on_tile_changed.lua
new file mode 100644
index 0000000..3993e31
--- /dev/null
+++ b/module/map/events/on_tile_changed.lua
@@ -0,0 +1,11 @@
+local function on_tile_changed(event)
+	local tiles = event.tiles
+	if global.gridworld.map.tiles_to_update == nil then
+		global.gridworld.map.tiles_to_update = {}
+	end
+	for _, tile in pairs(tiles) do
+		table.insert(global.gridworld.map.tiles_to_update, tile.position)
+	end
+end
+
+return on_tile_changed
diff --git a/module/map/map.lua b/module/map/map.lua
index a52fd6c..ce2fb8d 100644
--- a/module/map/map.lua
+++ b/module/map/map.lua
@@ -7,6 +7,7 @@ local entity_removed_unregistered = require("modules/gridworld/map/entity_remove
 
 local on_nth_tick = require("modules/gridworld/map/events/on_nth_tick")
 local on_chunk_generated = require("modules/gridworld/map/events/on_chunk_generated")
+local on_tile_changed = require("modules/gridworld/map/events/on_tile_changed")
 
 return {
 	dump_mapview = dump_mapview,
@@ -26,5 +27,11 @@ return {
 		on_robot_mined_entity = entity_removed_unregistered,
 		on_entity_died = entity_removed_unregistered,
 		on_pre_robot_exploded_cliff = entity_removed_unregistered,
+		-- Tile update events
+		on_player_built_tile = on_tile_changed,
+		on_player_mined_tile = on_tile_changed,
+		on_robot_built_tile = on_tile_changed,
+		on_robot_mined_tile = on_tile_changed,
+		script_raised_set_tiles = on_tile_changed,
 	},
 }
diff --git a/src/mapview/tileDataEventHandler.js b/src/mapview/tileDataEventHandler.js
index 1d29c18..89864d7 100644
--- a/src/mapview/tileDataEventHandler.js
+++ b/src/mapview/tileDataEventHandler.js
@@ -4,13 +4,13 @@ const path = require("path");
 sharp.cache(false);
 const sleep = require("../util/sleep");
 
+const TILE_SIZE = 512;
 const fileLocks = {}; // Used to prevent multiple writes to the same file
 const updates = new Map();
 
-module.exports = async function tileDataEventHandler({ type, data, size, position }) {
+module.exports = async function tileDataEventHandler({ type, data, size, position, layer }) {
 	// console.log(type, size, position);
 	// Image tiles are 512x512 pixels arranged in a grid, starting at 0,0
-	const TILE_SIZE = 512;
 	if (type === "pixels") {
 		if (data.length % 3 !== 0) {
 			this.logger.error(`Invalid pixel data length: ${data.length}`);
@@ -24,7 +24,7 @@ module.exports = async function tileDataEventHandler({ type, data, size, positio
 			// Figure out which image tile the pixel belongs to
 			const x_tile = (x - x % TILE_SIZE) / TILE_SIZE + (x < 0 ? -1 : 0);
 			const y_tile = (y - y % TILE_SIZE) / TILE_SIZE + (y < 0 ? -1 : 0);
-			const filename = `z10x${x_tile}y${y_tile}.png`;
+			const filename = `${layer}z10x${x_tile}y${y_tile}.png`;
 			if (!updates.has(filename)) {
 				updates.set(filename, new Set());
 			}
@@ -51,7 +51,7 @@ module.exports = async function tileDataEventHandler({ type, data, size, positio
 			const pixel_world_y = originPosition[1] + y;
 			const x_tile = (pixel_world_x - pixel_world_x % TILE_SIZE) / TILE_SIZE + (pixel_world_x < 0 ? -1 : 0);
 			const y_tile = (pixel_world_y - pixel_world_y % TILE_SIZE) / TILE_SIZE + (pixel_world_y < 0 ? -1 : 0);
-			const filename = `tiles_z10x${x_tile}y${y_tile}.png`;
+			const filename = `${layer}z10x${x_tile}y${y_tile}.png`;
 			if (!updates.has(filename)) {
 				updates.set(filename, new Set());
 			}
diff --git a/src/mapview/tileDataIpcHandler.js b/src/mapview/tileDataIpcHandler.js
index 8bb34f4..5a547af 100644
--- a/src/mapview/tileDataIpcHandler.js
+++ b/src/mapview/tileDataIpcHandler.js
@@ -13,5 +13,5 @@ module.exports = async function handleTileDataIpc(instancePlugin, json) {
 		instancePlugin.logger.error(`Received tile data with invalid type ${type}`);
 	}
 
-	await instancePlugin.instance.sendTo("controller", new messages.TileData(type, tileData, json.position, json.size));
+	await instancePlugin.instance.sendTo("controller", new messages.TileData(type, tileData, json.position, json.size, json.layer));
 };