diff --git a/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java b/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java
index 8a24c7003..e969660c8 100644
--- a/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java
+++ b/src/com/badlogic/gdx/backends/lwjgl/LwjglGraphics.java
@@ -129,7 +129,7 @@ public class LwjglGraphics implements Graphics {
     // only for a > 0 && b > 0
     private float getMagnitudeDifference(float a, float b) {
         if (a < getMagnitudeDifferenceEpsilon || b < getMagnitudeDifferenceEpsilon) {
-            return a + b;
+            return (a + b) / getMagnitudeDifferenceEpsilon;
         }
 
         if (a > b) {
diff --git a/src/net/torvald/terrarum/AppLoader.java b/src/net/torvald/terrarum/AppLoader.java
index 026cb3a70..1546f9792 100644
--- a/src/net/torvald/terrarum/AppLoader.java
+++ b/src/net/torvald/terrarum/AppLoader.java
@@ -154,18 +154,28 @@ public class AppLoader implements ApplicationListener {
 
     public static ArrayListMap debugTimers = new ArrayListMap<String, Long>();
 
+    static final int defaultW = 1110;
+    static final int defaultH = 740;
 
     public static void main(String[] args) {
+        // load configs
+        getDefaultDirectory();
+        createDirs();
+        readConfigJson();
+
+
         ShaderProgram.pedantic = false;
 
         LwjglApplicationConfiguration appConfig = new LwjglApplicationConfiguration();
         //appConfig.useGL30 = true; // used: loads GL 3.2, unused: loads GL 4.6; what the fuck?
-        appConfig.vSyncEnabled = true;
+        appConfig.vSyncEnabled = getConfigBoolean("usevsync");
         appConfig.resizable = false;//true;
-        appConfig.width = 1110; // photographic ratio (1.5:1)
-        appConfig.height = 740; // photographic ratio (1.5:1)
-        appConfig.backgroundFPS = 0;
-        appConfig.foregroundFPS = 0;
+        //appConfig.width = 1110; // photographic ratio (1.5:1)
+        //appConfig.height = 740; // photographic ratio (1.5:1)
+        appConfig.width = getConfigInt("screenwidth");
+        appConfig.height = getConfigInt("screenheight");
+        appConfig.backgroundFPS = getConfigInt("displayfps");
+        appConfig.foregroundFPS = getConfigInt("displayfps");
         appConfig.title = GAME_NAME;
         appConfig.forceExit = false;
 
@@ -396,16 +406,6 @@ public class AppLoader implements ApplicationListener {
     }
 
     private void postInit() {
-        // load configs
-        getDefaultDirectory();
-        createDirs();
-        readConfigJson();
-
-        // set render configs according to local config
-        appConfig.vSyncEnabled = getConfigBoolean("usevsync");
-        appConfig.foregroundFPS = getConfigInt("displayfps");
-        appConfig.backgroundFPS = getConfigInt("displayfps");
-
         textureWhiteSquare = new Texture(Gdx.files.internal("assets/graphics/ortho_line_tex_2px.tga"));
         textureWhiteSquare.setFilter(Texture.TextureFilter.Nearest, Texture.TextureFilter.Nearest);
 
@@ -459,7 +459,7 @@ public class AppLoader implements ApplicationListener {
     public static String configDir;
     public static RunningEnvironment environment;
 
-    private void getDefaultDirectory() {
+    private static void getDefaultDirectory() {
         String OS = OSName.toUpperCase();
         if (OS.contains("WIN")) {
             operationSystem = "WINDOWS";
@@ -495,7 +495,7 @@ public class AppLoader implements ApplicationListener {
         System.out.println(String.format("default directory: %s", defaultDir));
     }
 
-    private void createDirs() {
+    private static void createDirs() {
         File[] dirs = {new File(defaultSaveDir)};
 
         for (File it : dirs) {
@@ -641,7 +641,7 @@ public class AppLoader implements ApplicationListener {
 
         if (config == null) {
             if (defaults == null) {
-                throw new NullPointerException("key not found: '$key'");
+                throw new NullPointerException("key not found: '" + key + "'");
             }
             else {
                 return defaults;
@@ -661,13 +661,13 @@ public class AppLoader implements ApplicationListener {
     // //
 
     public static void printdbg(Object obj, Object message) {
-        if (IS_DEVELOPMENT_BUILD || getConfigBoolean("forcedevbuild")) {
+        if (IS_DEVELOPMENT_BUILD) {
             System.out.println("[" + obj.getClass().getSimpleName() + "] " + message.toString());
         }
     }
 
     public static void printdbgerr(Object obj, Object message) {
-        if (IS_DEVELOPMENT_BUILD || getConfigBoolean("forcedevbuild")) {
+        if (IS_DEVELOPMENT_BUILD) {
             System.err.println("[" + obj.getClass().getSimpleName() + "] " + message.toString());
         }
     }
diff --git a/src/net/torvald/terrarum/DefaultConfig.kt b/src/net/torvald/terrarum/DefaultConfig.kt
index 38fdac185..7ac66f495 100644
--- a/src/net/torvald/terrarum/DefaultConfig.kt
+++ b/src/net/torvald/terrarum/DefaultConfig.kt
@@ -15,7 +15,8 @@ object DefaultConfig {
 
         jsonObject.addProperty("displayfps", 0) // 0: no limit, non-zero: limit
         jsonObject.addProperty("usevsync", false)
-        jsonObject.addProperty("forcedevbuild", false)
+        jsonObject.addProperty("screenwidth", AppLoader.defaultW)
+        jsonObject.addProperty("screenheight", AppLoader.defaultH)
 
 
         jsonObject.addProperty("imtooyoungtodie", false) // no perma-death
diff --git a/src/net/torvald/terrarum/PostProcessor.kt b/src/net/torvald/terrarum/PostProcessor.kt
index 5d9371345..bb8b75fa4 100644
--- a/src/net/torvald/terrarum/PostProcessor.kt
+++ b/src/net/torvald/terrarum/PostProcessor.kt
@@ -1,12 +1,13 @@
 package net.torvald.terrarum
 
 import com.badlogic.gdx.Gdx
+import com.badlogic.gdx.graphics.Color
 import com.badlogic.gdx.graphics.GL20
 import com.badlogic.gdx.graphics.Texture
 import com.badlogic.gdx.graphics.g2d.SpriteBatch
-import com.badlogic.gdx.graphics.g2d.TextureRegion
 import com.badlogic.gdx.graphics.glutils.FrameBuffer
 import com.badlogic.gdx.graphics.glutils.ShaderProgram
+import com.badlogic.gdx.graphics.glutils.ShapeRenderer
 import com.badlogic.gdx.math.Matrix4
 import kotlin.system.measureNanoTime
 
@@ -16,21 +17,26 @@ import kotlin.system.measureNanoTime
 object PostProcessor {
 
     private lateinit var batch: SpriteBatch // not nulling to save some lines of code
+    private lateinit var shapeRenderer: ShapeRenderer
     //private lateinit var camera: OrthographicCamera
-    private var textureRegion: TextureRegion? = null
+    //private var textureRegion: TextureRegion? = null
 
 
     private lateinit var lutTex: Texture
 
+    private var init = false
+
     fun reloadLUT(filename: String) {
         lutTex = Texture(Gdx.files.internal("assets/clut/$filename"))
     }
 
     fun draw(projMat: Matrix4, fbo: FrameBuffer) {
 
-        if (textureRegion == null) {
-            textureRegion = TextureRegion(fbo.colorBufferTexture)
+        // init
+        if (!init) {
+            //textureRegion = TextureRegion(fbo.colorBufferTexture)
             batch = SpriteBatch()
+            shapeRenderer = ShapeRenderer()
             Gdx.gl20.glViewport(0, 0, AppLoader.appConfig.width, AppLoader.appConfig.height)
         }
 
@@ -58,7 +64,17 @@ object PostProcessor {
 
             Gdx.gl.glActiveTexture(GL20.GL_TEXTURE0) // so that batch that comes next will bind any tex to it
 
-
+            if (AppLoader.IS_DEVELOPMENT_BUILD) {
+                shapeRenderer.color = Color.CYAN
+                shapeRenderer.inUse(ShapeRenderer.ShapeType.Line) {
+                    shapeRenderer.rect(
+                            (AppLoader.screenW - AppLoader.defaultW).div(2).toFloat(),
+                            (AppLoader.screenH - AppLoader.defaultH).div(2).toFloat(),
+                            AppLoader.defaultW.toFloat(),
+                            AppLoader.defaultH.toFloat()
+                    )
+                }
+            }
         }
     }