diff --git a/Actors/Objects/Lightbulb/Lightbulb.gd b/Actors/Objects/Lightbulb/Lightbulb.gd
index abe5412..7939d23 100644
--- a/Actors/Objects/Lightbulb/Lightbulb.gd
+++ b/Actors/Objects/Lightbulb/Lightbulb.gd
@@ -45,7 +45,6 @@ func refresh_sprite():
 		Direction.RIGHT:
 			$light.region_rect.position = Vector2(64, lit_offset)
 			rot = PI/2
-	$Light2D.rotation = rot
 	$ActivationRange.rotation = rot
 			
 
@@ -61,4 +60,4 @@ func _power_status_changed(_powered: bool) -> void:
 	refresh_sprite()
 
 func update_light():
-	$Light2D.enabled = lit and (manager != null and manager.powered)
+	pass
diff --git a/Actors/Objects/Lightbulb/Lightbulb.tscn b/Actors/Objects/Lightbulb/Lightbulb.tscn
index 25b0958..f6f3cf5 100644
--- a/Actors/Objects/Lightbulb/Lightbulb.tscn
+++ b/Actors/Objects/Lightbulb/Lightbulb.tscn
@@ -1,6 +1,5 @@
-[gd_scene load_steps=8 format=2]
+[gd_scene load_steps=7 format=2]
 
-[ext_resource path="res://Graphics/light_shadow_light.png" type="Texture" id=1]
 [ext_resource path="res://Graphics/tgstation/light.png" type="Texture" id=2]
 [ext_resource path="res://Actors/Objects/Lightbulb/Lightbulb.gd" type="Script" id=3]
 [ext_resource path="res://Actors/Components/ActivationRange.gd" type="Script" id=4]
@@ -23,19 +22,6 @@ texture = ExtResource( 2 )
 region_enabled = true
 region_rect = Rect2( 32, 0, 32, 32 )
 
-[node name="Light2D" type="Light2D" parent="."]
-enabled = false
-texture = ExtResource( 1 )
-texture_scale = 3.5
-energy = 1.2
-mode = 2
-shadow_color = Color( 0, 0, 0, 1 )
-shadow_filter_smooth = 10.0
-__meta__ = {
-"_edit_group_": true,
-"_edit_lock_": true
-}
-
 [node name="ActivationRange" type="Area2D" parent="."]
 visible = false
 script = ExtResource( 4 )
diff --git a/Scenes/Game.gd b/Scenes/Game.gd
index 532f944..a7550f0 100644
--- a/Scenes/Game.gd
+++ b/Scenes/Game.gd
@@ -3,11 +3,13 @@ extends Node
 class_name GameInstance
 
 onready var ui = $CanvasLayer/ui
+onready var lighting = $CanvasLayer/sslo
 onready var world = $world
 onready var systems = $systems
 
 func _ready():
 	ui.connect("command", world, "process_command")
+	world.initiate()
 
 func process_command(cmd: UICommand):
 	match cmd.cmd_type:
diff --git a/Scenes/Map.gd b/Scenes/Map.gd
index 998ae47..84fd981 100644
--- a/Scenes/Map.gd
+++ b/Scenes/Map.gd
@@ -20,7 +20,6 @@ onready var tilemaps = [ $base, $cables, $floor, $walls ]
 onready var pois = $pois
 
 export var unlit = false setget set_unlit
-onready var darkness = $darkness
 
 export var shadow_intensity = 0.2
 
@@ -54,8 +53,6 @@ func _process(delta: float):
 
 func set_unlit(val: bool):
 	unlit = val
-	if darkness:
-		darkness.visible = not val
 
 # Engine related functions
 
diff --git a/Scenes/Maps/odyssey.gd b/Scenes/Maps/odyssey.gd
index a2b9ff4..a4ba1e7 100644
--- a/Scenes/Maps/odyssey.gd
+++ b/Scenes/Maps/odyssey.gd
@@ -7,3 +7,9 @@ func _ready():
 		$floor,
 		$walls
 	]
+
+func get_occlusion_mask():
+	return $walls.create_occlusion_mask()
+
+func get_occlusion_offset():
+	return $walls.get_used_rect().position
diff --git a/Scenes/Maps/odyssey.tscn b/Scenes/Maps/odyssey.tscn
index ebbd860..5d389d5 100644
--- a/Scenes/Maps/odyssey.tscn
+++ b/Scenes/Maps/odyssey.tscn
@@ -22,10 +22,6 @@ light_mode = 1
 [node name="map" type="Node2D"]
 script = ExtResource( 5 )
 
-[node name="darkness" type="CanvasModulate" parent="."]
-visible = false
-color = Color( 0, 0, 0, 1 )
-
 [node name="editor" type="Node2D" parent="."]
 
 [node name="deepspace" type="Sprite" parent="."]
@@ -92,14 +88,17 @@ __meta__ = {
 [node name="Engine" parent="engines" instance=ExtResource( 10 )]
 position = Vector2( -320, 321 )
 direction = 0
+strength = 1.0
 
 [node name="Engine2" parent="engines" instance=ExtResource( 10 )]
 position = Vector2( -480, 208 )
 direction = 0
+strength = 1.0
 
 [node name="Engine3" parent="engines" instance=ExtResource( 10 )]
 position = Vector2( -320, 96 )
 direction = 0
+strength = 1.0
 
 [node name="objects" type="Node2D" parent="."]
 z_index = 10
@@ -450,10 +449,6 @@ flow = 1
 [node name="lights" type="Node2D" parent="."]
 modulate = Color( 0.980392, 0.980392, 0.980392, 1 )
 z_index = 11
-__meta__ = {
-"_edit_group_": true,
-"_edit_lock_": true
-}
 
 [node name="Lighttube" parent="lights" instance=ExtResource( 8 )]
 position = Vector2( 80, 144 )
diff --git a/Scenes/Rendering/MapTiles.gd b/Scenes/Rendering/MapTiles.gd
index cf94833..f511a7f 100644
--- a/Scenes/Rendering/MapTiles.gd
+++ b/Scenes/Rendering/MapTiles.gd
@@ -13,13 +13,9 @@ export var shadow_intensity = 0.2
 onready var extended_tilemap = get_node(extended_tilemap_node) as TileMap
 
 func _ready():
-	# Make occluders
-	make_occluders()
-
 	# Convert 2x2 tiles to 1x1 if possible
 	convert_extended()
 
-
 func convert_extended():
 	var extended = extended_tilemap.tile_set
 	for id in tile_set.get_tiles_ids():
@@ -40,31 +36,20 @@ func convert_extended():
 	extended_tilemap.update_bitmask_region()
 	extended_tilemap.update_dirty_quadrants()
 
-func make_occluders():
+func create_occlusion_mask():
+	var tile_size = get_used_rect()
+	var mask_image = Image.new()
+	mask_image.create(tile_size.size.x, tile_size.size.y, false, Image.FORMAT_L8)
+	mask_image.fill(Color.black)
+	mask_image.lock()
 	var occluder_ids = []
-	for occluder_name in occluders:
-		var id = tile_set.find_tile_by_name(occluder_name)
-		if id >= 0:
-			occluder_ids.push_back(id)
-	for id in tile_set.get_tiles_ids():
-		if occluder_ids.find(id) < 0:
-			# Not an occluder, skip it
-			continue
-		# Find all uses of this tile
-		for cell in get_used_cells_by_id(id):
-			# Check sides
-			var occluder = Occluder.new()
-			occluder.ignore_sides = [
-				occluder_ids.find(get_cell(cell.x, cell.y-1)) >= 0, # Top
-				occluder_ids.find(get_cell(cell.x+1, cell.y)) >= 0, # Right
-				occluder_ids.find(get_cell(cell.x, cell.y+1)) >= 0, # Bottom
-				occluder_ids.find(get_cell(cell.x-1, cell.y)) >= 0  # Left
-			]
-			occluder.transform.origin = map_to_world(cell)
-			add_child(occluder)
-			
-
-func set_occluder_origin(origin):
-	for child in get_children():
-		if child is Occluder:
-			child.origin = origin
+	for occluder in occluders:
+		occluder_ids.append(tile_set.find_tile_by_name(occluder))
+	for occluder_id in occluder_ids:
+		for cell in get_used_cells_by_id(occluder_id):
+			mask_image.set_pixelv(cell - tile_size.position, Color.white)
+	mask_image.unlock()
+	mask_image.save_png("res://test.png")
+	var mask_texture = ImageTexture.new()
+	mask_texture.create_from_image(mask_image, 0)
+	return mask_texture
diff --git a/Scenes/Rendering/Occluder.gd b/Scenes/Rendering/Occluder.gd
deleted file mode 100644
index 87f0155..0000000
--- a/Scenes/Rendering/Occluder.gd
+++ /dev/null
@@ -1,52 +0,0 @@
-extends Node2D
-
-class_name Occluder
-
-const MAX_LENGTH = 200
-const EPSILON = 0.1
-const DEBUG = false
-
-var ignore_sides = [false, false, false, false]
-var size = Vector2(32, 32)
-var origin = null
-var polygon: PoolVector2Array = [Vector2.ZERO, Vector2(size.x, 0), Vector2(size.x, size.y), Vector2(0, size.y)]
-
-func _draw():
-	if polygon == null:
-		return
-
-	if origin == null:
-		return
-		
-	var player_position =  origin.global_position - global_position
-	
-	# Find what edges is the players looking at
-	var edges = [
-		player_position.y < 0, # TOP
-		player_position.x > size.x*2, # RIGHT
-		player_position.y > size.y*2, # BOTTOM
-		player_position.x < 0 # LEFT
-	]
-
-	for current in range(0, polygon.size()):
-		var next = (current + 1) % polygon.size()
-
-		if not ignore_sides[current] and not edges[current]:
-			var points = [
-				(polygon[current] * 2.1 - origin.global_position + global_position) * MAX_LENGTH,
-				polygon[current], polygon[next],
-				(polygon[next] * 2.1 - origin.global_position + global_position) * MAX_LENGTH
-			]
-			draw_polygon(points, [Color.black])
-			if DEBUG:
-				draw_polyline(points, Color.rebeccapurple)
-		else:
-			if DEBUG:
-				if ignore_sides[current]:
-					draw_line(polygon[current], polygon[next], Color.red, 1)
-				else:
-					draw_line(polygon[current], polygon[next], Color.yellow, 2)
-
-func _process(_delta):
-	update()
-	z_index = 999
diff --git a/Scenes/Rendering/SSLO.gd b/Scenes/Rendering/SSLO.gd
new file mode 100644
index 0000000..d4fadfe
--- /dev/null
+++ b/Scenes/Rendering/SSLO.gd
@@ -0,0 +1,15 @@
+extends ColorRect
+
+var player = null
+var occlusion_mask: ImageTexture = null
+var occlusion_offset = Vector2.ZERO
+
+onready var shader = (material as ShaderMaterial)
+
+func _process(delta):
+	if occlusion_mask != null:
+		shader.set_shader_param("occlusion_mask", occlusion_mask)
+		shader.set_shader_param("occlusion_rect", Color(occlusion_offset.x, occlusion_offset.y, occlusion_mask.get_width(), occlusion_mask.get_height()))
+	var viewport_rect = get_viewport_rect()
+	var camera_offset = player.camera.get_camera_position() - viewport_rect.size * 0.5
+	shader.set_shader_param("viewport_rect", Color(camera_offset.x, camera_offset.y, viewport_rect.size.x, viewport_rect.size.y))
diff --git a/Scenes/Rendering/SSLO.shader b/Scenes/Rendering/SSLO.shader
new file mode 100644
index 0000000..7efa73e
--- /dev/null
+++ b/Scenes/Rendering/SSLO.shader
@@ -0,0 +1,34 @@
+shader_type canvas_item;
+render_mode unshaded;
+
+uniform vec4 viewport_rect;
+uniform sampler2D occlusion_mask;
+uniform vec4 occlusion_rect;
+uniform float cell_div = 0.03125; // 1/cell_size = 1/32
+uniform float diffusion = 0.3;
+uniform float scale_factor = 0.5;
+
+float tile_at(vec2 coord, vec2 camera_tile_offset, vec2 occlusion_div) {
+	return texture(occlusion_mask, (coord * cell_div - occlusion_rect.xy) * occlusion_div + camera_tile_offset).r;
+}
+
+void fragment() {
+	vec2 occlusion_div = 1.0 / occlusion_rect.zw;
+	vec2 camera_offset = viewport_rect.xy * scale_factor;
+	vec2 camera_tile_offset = camera_offset * cell_div * occlusion_div;
+
+	vec2 coords = UV.xy * viewport_rect.zw * scale_factor;
+	float tile = tile_at(coords, camera_tile_offset, occlusion_div);
+	
+	vec4 ray_coords = vec4(0,0, viewport_rect.zw/2.) * scale_factor;
+	vec2 ray_dir = normalize(ray_coords.zw - ray_coords.xy);
+	if (int(coords.x+camera_offset.x) % 32 < 1 || int(coords.y+camera_offset.y) % 32 < 1) {
+		COLOR = vec4(1);
+	} else if (distance(coords, ray_coords.xy) < 10.0 || distance(coords, ray_coords.zw) < 10.) {
+		COLOR = vec4(0,1,0,1);
+	} else if (tile >= diffusion) {
+		COLOR = vec4(1,0,0,1);
+	} else {
+		COLOR = texture(SCREEN_TEXTURE, SCREEN_UV);
+	}
+}
\ No newline at end of file
diff --git a/Scenes/SSLOTest.tscn b/Scenes/SSLOTest.tscn
new file mode 100644
index 0000000..faeb80f
--- /dev/null
+++ b/Scenes/SSLOTest.tscn
@@ -0,0 +1,92 @@
+[gd_scene load_steps=9 format=2]
+
+[ext_resource path="res://Scenes/Maps/odyssey.tscn" type="PackedScene" id=1]
+[ext_resource path="res://Scenes/Rendering/SSLO.shader" type="Shader" id=2]
+[ext_resource path="res://Scenes/UI.tscn" type="PackedScene" id=3]
+[ext_resource path="res://Scenes/Rendering/SSLO.gd" type="Script" id=4]
+[ext_resource path="res://Scenes/Game.gd" type="Script" id=5]
+[ext_resource path="res://test.png" type="Texture" id=6]
+
+[sub_resource type="GDScript" id=1]
+script/source = "extends Node2D
+
+enum Map { RUNTIME, ODYSSEY }
+
+export(Map) var mapToLoad = Map.RUNTIME
+
+const playerRes = preload(\"res://Actors/Player/Player.tscn\")
+
+var map = null
+var player = null
+
+func initiate():
+	player = playerRes.instance()
+	player.is_controlled = true
+	map = $map
+	var spawnpoints = map.get_pois(POIData.POIType.SpawnPoint, POIData.POIClass.Player)
+	if spawnpoints.size() > 0:
+		player.transform.origin = (spawnpoints[0] as Node2D).transform.origin
+	else:
+		print(\"Map does not have Player spawnpoint POI! Spawning at origin (very bad)\")
+	$players.add_child(player)
+	$\"/root/scene\".lighting.player = player
+	var occlusion_mask = map.get_occlusion_mask()
+	$\"/root/scene\".lighting.occlusion_mask = occlusion_mask
+	$\"/root/scene\".lighting.occlusion_offset = map.get_occlusion_offset()
+	print(map.get_occlusion_offset())
+	($\"/root/scene/CanvasLayer/TextureRect\" as TextureRect).texture = occlusion_mask
+
+func initiate_editor():
+	map = $map
+	var occlusion_mask = map.get_occlusion_mask()
+	$\"/root/scene\".lighting.occlusion_mask = occlusion_mask
+	($\"/root/scene/CanvasLayer/TextureRect\" as TextureRect).texture = occlusion_mask
+"
+
+[sub_resource type="ShaderMaterial" id=2]
+shader = ExtResource( 2 )
+shader_param/viewport_rect = Plane( 0, 0, 1280, 800 )
+shader_param/occlusion_rect = Plane( -12, -9, 32, 33 )
+shader_param/cell_div = 0.03125
+shader_param/diffusion = 0.3
+shader_param/scale_factor = 0.5
+shader_param/occlusion_mask = ExtResource( 6 )
+
+[node name="scene" type="Node"]
+script = ExtResource( 5 )
+
+[node name="systems" type="Node" parent="."]
+
+[node name="world" type="Node2D" parent="."]
+scale = Vector2( 2, 2 )
+script = SubResource( 1 )
+
+[node name="map" parent="world" instance=ExtResource( 1 )]
+
+[node name="players" type="Node2D" parent="world"]
+
+[node name="CanvasLayer" type="CanvasLayer" parent="."]
+
+[node name="TextureRect" type="TextureRect" parent="CanvasLayer"]
+visible = false
+margin_right = 20.0
+margin_bottom = 15.0
+rect_scale = Vector2( 4, 4 )
+mouse_filter = 2
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="sslo" type="ColorRect" parent="CanvasLayer"]
+material = SubResource( 2 )
+anchor_right = 1.0
+anchor_bottom = 1.0
+mouse_filter = 2
+color = Color( 0, 0, 0, 0.764706 )
+script = ExtResource( 4 )
+__meta__ = {
+"_edit_use_anchors_": false
+}
+
+[node name="ui" parent="CanvasLayer" instance=ExtResource( 3 )]
+visible = false
diff --git a/project.godot b/project.godot
index e43245f..9699197 100644
--- a/project.godot
+++ b/project.godot
@@ -69,11 +69,6 @@ _global_script_classes=[ {
 "language": "GDScript",
 "path": "res://Scenes/Rendering/MapTiles.gd"
 }, {
-"base": "Node2D",
-"class": "Occluder",
-"language": "GDScript",
-"path": "res://Scenes/Rendering/Occluder.gd"
-}, {
 "base": "Reference",
 "class": "POIData",
 "language": "GDScript",
@@ -117,7 +112,6 @@ _global_script_class_icons={
 "GameObjectScanner": "",
 "GameWorld": "",
 "MapTiles": "",
-"Occluder": "",
 "POIData": "",
 "PowerManager": "",
 "PowerNetwork": "",
diff --git a/test.png b/test.png
new file mode 100644
index 0000000..e79d9f3
Binary files /dev/null and b/test.png differ
diff --git a/test.png.import b/test.png.import
new file mode 100644
index 0000000..f8f1de4
--- /dev/null
+++ b/test.png.import
@@ -0,0 +1,34 @@
+[remap]
+
+importer="texture"
+type="StreamTexture"
+path="res://.import/test.png-2b0b935732229e5bd5e655f2644b2498.stex"
+metadata={
+"vram_texture": false
+}
+
+[deps]
+
+source_file="res://test.png"
+dest_files=[ "res://.import/test.png-2b0b935732229e5bd5e655f2644b2498.stex" ]
+
+[params]
+
+compress/mode=0
+compress/lossy_quality=0.7
+compress/hdr_mode=0
+compress/bptc_ldr=0
+compress/normal_map=0
+flags/repeat=0
+flags/filter=false
+flags/mipmaps=false
+flags/anisotropic=false
+flags/srgb=2
+process/fix_alpha_border=true
+process/premult_alpha=false
+process/HDR_as_SRGB=false
+process/invert_color=false
+stream=false
+size_limit=0
+detect_3d=true
+svg/scale=1.0