diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/RenderWindow.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/RenderWindow.kt
index 314022b7a..383170912 100644
--- a/src/main/java/de/bixilon/minosoft/gui/rendering/RenderWindow.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/RenderWindow.kt
@@ -13,8 +13,13 @@
 
 package de.bixilon.minosoft.gui.rendering
 
+import de.bixilon.minosoft.Minosoft
 import de.bixilon.minosoft.config.config.game.controls.KeyBindingsNames
 import de.bixilon.minosoft.data.registries.ResourceLocation
+import de.bixilon.minosoft.gui.rendering.block.WorldRenderer
+import de.bixilon.minosoft.gui.rendering.block.chunk.ChunkBorderRenderer
+import de.bixilon.minosoft.gui.rendering.block.outline.BlockOutlineRenderer
+import de.bixilon.minosoft.gui.rendering.entity.EntityHitBoxRenderer
 import de.bixilon.minosoft.gui.rendering.font.Font
 import de.bixilon.minosoft.gui.rendering.font.FontLoader
 import de.bixilon.minosoft.gui.rendering.gui.hud.HUDRenderer
@@ -22,6 +27,8 @@ import de.bixilon.minosoft.gui.rendering.gui.hud.atlas.TextureLike
 import de.bixilon.minosoft.gui.rendering.gui.hud.atlas.TextureLikeTexture
 import de.bixilon.minosoft.gui.rendering.input.key.RenderWindowInputHandler
 import de.bixilon.minosoft.gui.rendering.modding.events.*
+import de.bixilon.minosoft.gui.rendering.particle.ParticleRenderer
+import de.bixilon.minosoft.gui.rendering.sky.SkyRenderer
 import de.bixilon.minosoft.gui.rendering.stats.AbstractRenderStats
 import de.bixilon.minosoft.gui.rendering.system.base.IntegratedBufferTypes
 import de.bixilon.minosoft.gui.rendering.system.base.PolygonModes
@@ -111,7 +118,7 @@ class RenderWindow(
         })
 
         // order dependent (from back to front)
-/*        registerRenderer(SkyRenderer)
+        registerRenderer(SkyRenderer)
         registerRenderer(WorldRenderer)
         registerRenderer(BlockOutlineRenderer)
         if (Minosoft.config.config.game.graphics.particles.enabled) {
@@ -122,7 +129,7 @@ class RenderWindow(
         }
         if (Minosoft.config.config.game.world.chunkBorders.enabled) {
             registerRenderer(ChunkBorderRenderer)
-        }*/
+        }
         registerRenderer(HUDRenderer)
     }
 
diff --git a/src/main/java/de/bixilon/minosoft/gui/rendering/gui/hud/hud/DebugHUD.kt b/src/main/java/de/bixilon/minosoft/gui/rendering/gui/hud/hud/DebugHUD.kt
index 5591c7f09..7b0289083 100644
--- a/src/main/java/de/bixilon/minosoft/gui/rendering/gui/hud/hud/DebugHUD.kt
+++ b/src/main/java/de/bixilon/minosoft/gui/rendering/gui/hud/hud/DebugHUD.kt
@@ -17,7 +17,6 @@ import de.bixilon.minosoft.data.text.ChatColors
 import de.bixilon.minosoft.data.text.TextComponent
 import de.bixilon.minosoft.gui.rendering.RenderWindow
 import de.bixilon.minosoft.gui.rendering.block.WorldRenderer
-import de.bixilon.minosoft.gui.rendering.font.Font
 import de.bixilon.minosoft.gui.rendering.gui.elements.Element
 import de.bixilon.minosoft.gui.rendering.gui.elements.ElementAlignments
 import de.bixilon.minosoft.gui.rendering.gui.elements.layout.RowLayout
@@ -29,15 +28,21 @@ import de.bixilon.minosoft.gui.rendering.gui.elements.text.TextElement
 import de.bixilon.minosoft.gui.rendering.gui.hud.HUDRenderer
 import de.bixilon.minosoft.gui.rendering.modding.events.ResizeWindowEvent
 import de.bixilon.minosoft.gui.rendering.particle.ParticleRenderer
+import de.bixilon.minosoft.modding.event.events.DifficultyChangeEvent
 import de.bixilon.minosoft.modding.event.invoker.CallbackEventInvoker
+import de.bixilon.minosoft.modding.loading.ModLoader
 import de.bixilon.minosoft.terminal.RunConfiguration
+import de.bixilon.minosoft.util.GitInfo
+import de.bixilon.minosoft.util.KUtil.decide
 import de.bixilon.minosoft.util.KUtil.format
 import de.bixilon.minosoft.util.MMath.round10
+import de.bixilon.minosoft.util.SystemInformation
 import glm_.vec2.Vec2i
 import glm_.vec4.Vec4i
 
 class DebugHUD(val hudRenderer: HUDRenderer) : HUD<GridLayout> {
     override val renderWindow: RenderWindow = hudRenderer.renderWindow
+    private val connection = renderWindow.connection
     override val layout = GridLayout(hudRenderer, Vec2i(3, 1)).apply {
         columnConstraints[0].apply {
             grow = GridGrow.NEVER
@@ -57,14 +62,14 @@ class DebugHUD(val hudRenderer: HUDRenderer) : HUD<GridLayout> {
     }
 
     private fun initLeft(): Element {
-        val layout = RowLayout(hudRenderer, spacing = Font.VERTICAL_SPACING)
+        val layout = RowLayout(hudRenderer)
         layout.margin = Vec4i(5)
         layout += TextElement(hudRenderer, TextComponent(RunConfiguration.VERSION_STRING, ChatColors.RED))
         layout += AutoTextElement(hudRenderer, 1) { "FPS ${renderWindow.renderStats.smoothAvgFPS.round10}" }
         renderWindow[WorldRenderer]?.apply {
-            layout += AutoTextElement(hudRenderer, 1) { "C v=${visibleChunks.size}, p=${allChunkSections.size}, q=${queuedChunks.size}, t=${renderWindow.connection.world.chunks.size}" }
+            layout += AutoTextElement(hudRenderer, 1) { "C v=${visibleChunks.size}, p=${allChunkSections.size}, q=${queuedChunks.size}, t=${connection.world.chunks.size}" }
         }
-        layout += AutoTextElement(hudRenderer, 1) { "E t=${renderWindow.connection.world.entities.size}" }
+        layout += AutoTextElement(hudRenderer, 1) { "E t=${connection.world.entities.size}" }
 
         renderWindow[ParticleRenderer]?.apply {
             layout += AutoTextElement(hudRenderer, 1) { "P t=$size" }
@@ -73,30 +78,65 @@ class DebugHUD(val hudRenderer: HUDRenderer) : HUD<GridLayout> {
         layout += LineSpacerElement(hudRenderer)
 
 
-        renderWindow.connection.player.apply {
+        connection.player.apply {
             layout += AutoTextElement(hudRenderer, 1) { with(position) { "XYZ ${x.format()} / ${y.format()} / ${z.format()}" } }
             layout += AutoTextElement(hudRenderer, 1) { with(positionInfo.blockPosition) { "Block $x $y $z" } }
         }
+
         layout += LineSpacerElement(hudRenderer)
+
+        val chunk = connection.world[connection.player.positionInfo.chunkPosition]
+
+        if (chunk == null) {
+            layout += TextElement(hudRenderer, "Waiting for chunk...") // ToDo
+        }
+
+        layout += LineSpacerElement(hudRenderer)
+
+        layout += TextElement(hudRenderer, "Difficulty ${connection.world.difficulty.format()}, ${connection.world.difficultyLocked.decide("locked", "unlocked")}", ElementAlignments.RIGHT).apply {
+            connection.registerEvent(CallbackEventInvoker.of<DifficultyChangeEvent> {
+                text = "Difficulty ${it.difficulty.format()}, ${it.locked.decide("locked", "unlocked")}"
+            })
+        }
+
         return layout
     }
 
     private fun initRight(): Element {
-        val layout = RowLayout(hudRenderer, ElementAlignments.RIGHT, Font.VERTICAL_SPACING)
+        val layout = RowLayout(hudRenderer, ElementAlignments.RIGHT)
         layout.margin = Vec4i(5)
         layout += TextElement(hudRenderer, "Java ${Runtime.version()} ${System.getProperty("sun.arch.data.model")}bit", ElementAlignments.RIGHT)
 
         layout += LineSpacerElement(hudRenderer)
 
+        layout += TextElement(hudRenderer, "OS ${SystemInformation.OS_TEXT}", ElementAlignments.RIGHT)
+        layout += TextElement(hudRenderer, "CPU ${SystemInformation.PROCESSOR_TEXT}", ElementAlignments.RIGHT)
+
+        layout += LineSpacerElement(hudRenderer)
+
         layout += TextElement(hudRenderer, "Display TBA", ElementAlignments.RIGHT).apply {
             hudRenderer.connection.registerEvent(CallbackEventInvoker.of<ResizeWindowEvent> {
                 text = "Display ${it.size.x}x${it.size.y}"
             })
         }
+
         renderWindow.renderSystem.apply {
-            layout += TextElement(hudRenderer, "GPU $vendorString", ElementAlignments.RIGHT)
+            layout += TextElement(hudRenderer, "GPU $gpuType", ElementAlignments.RIGHT)
             layout += TextElement(hudRenderer, "Version $version", ElementAlignments.RIGHT)
         }
+
+        if (GitInfo.IS_INITIALIZED) {
+            layout += LineSpacerElement(hudRenderer)
+
+            GitInfo.apply {
+                layout += TextElement(hudRenderer, "Git $GIT_COMMIT_ID_ABBREV: $GIT_COMMIT_MESSAGE_SHORT", ElementAlignments.RIGHT)
+            }
+        }
+
+        layout += LineSpacerElement(hudRenderer)
+
+        layout += TextElement(hudRenderer, "Mods ${ModLoader.MOD_MAP.size}x loaded, ${connection.size}x listeners", ElementAlignments.RIGHT)
+
         return layout
     }
 }
diff --git a/src/main/java/de/bixilon/minosoft/modding/event/events/DifficultyChangeEvent.kt b/src/main/java/de/bixilon/minosoft/modding/event/events/DifficultyChangeEvent.kt
new file mode 100644
index 000000000..c42f26085
--- /dev/null
+++ b/src/main/java/de/bixilon/minosoft/modding/event/events/DifficultyChangeEvent.kt
@@ -0,0 +1,29 @@
+/*
+ * Minosoft
+ * Copyright (C) 2020 Moritz Zwerger
+ *
+ * This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
+ *
+ * This software is not affiliated with Mojang AB, the original developer of Minecraft.
+ */
+package de.bixilon.minosoft.modding.event.events
+
+import de.bixilon.minosoft.data.Difficulties
+import de.bixilon.minosoft.modding.event.EventInitiators
+import de.bixilon.minosoft.modding.event.events.connection.play.PlayConnectionEvent
+import de.bixilon.minosoft.protocol.network.connection.play.PlayConnection
+import de.bixilon.minosoft.protocol.packets.s2c.play.ServerDifficultyS2CP
+
+class DifficultyChangeEvent(
+    connection: PlayConnection,
+    initiator: EventInitiators = EventInitiators.DEFAULT,
+    val difficulty: Difficulties,
+    val locked: Boolean,
+) : PlayConnectionEvent(connection, initiator) {
+
+    constructor(connection: PlayConnection, packet: ServerDifficultyS2CP) : this(connection, EventInitiators.SERVER, packet.difficulty, packet.locked)
+}
diff --git a/src/main/java/de/bixilon/minosoft/protocol/packets/s2c/play/ServerDifficultyS2CP.kt b/src/main/java/de/bixilon/minosoft/protocol/packets/s2c/play/ServerDifficultyS2CP.kt
index 69835a532..968b72b4e 100644
--- a/src/main/java/de/bixilon/minosoft/protocol/packets/s2c/play/ServerDifficultyS2CP.kt
+++ b/src/main/java/de/bixilon/minosoft/protocol/packets/s2c/play/ServerDifficultyS2CP.kt
@@ -13,6 +13,7 @@
 package de.bixilon.minosoft.protocol.packets.s2c.play
 
 import de.bixilon.minosoft.data.Difficulties
+import de.bixilon.minosoft.modding.event.events.DifficultyChangeEvent
 import de.bixilon.minosoft.protocol.network.connection.play.PlayConnection
 import de.bixilon.minosoft.protocol.packets.s2c.PlayS2CPacket
 import de.bixilon.minosoft.protocol.protocol.PlayInByteBuffer
@@ -35,6 +36,7 @@ class ServerDifficultyS2CP(buffer: PlayInByteBuffer) : PlayS2CPacket() {
     override fun handle(connection: PlayConnection) {
         connection.world.difficulty = difficulty
         connection.world.difficultyLocked = locked
+        connection.fireEvent(DifficultyChangeEvent(connection, this))
     }
 
     override fun log() {