diff --git a/src/net/torvald/terrarum/App.java b/src/net/torvald/terrarum/App.java
index 09cab63ca..d2f484760 100644
--- a/src/net/torvald/terrarum/App.java
+++ b/src/net/torvald/terrarum/App.java
@@ -14,6 +14,7 @@ import com.badlogic.gdx.graphics.glutils.*;
 import com.badlogic.gdx.utils.Disposable;
 import com.badlogic.gdx.utils.GdxRuntimeException;
 import com.badlogic.gdx.utils.JsonValue;
+import com.badlogic.gdx.utils.SharedLibraryLoader;
 import com.github.strikerx3.jxinput.XInputDevice;
 import kotlin.jvm.functions.Function0;
 import kotlin.text.Charsets;
@@ -351,7 +352,8 @@ public class App implements ApplicationListener {
     }
 
     public static ShapeRenderer makeShapeRenderer() {
-        return new ShapeRenderer(5000, DefaultGL32Shaders.INSTANCE.createShapeRendererShader());
+        ShapeRenderer s = new ShapeRenderer(5000, DefaultGL32Shaders.INSTANCE.createShapeRendererShader());
+        return s;
     }
 
     public static boolean gl40capable = false;
@@ -468,7 +470,11 @@ public class App implements ApplicationListener {
             appConfig.setTitle(GAME_NAME);
             //appConfig.forceExit = true; // it seems KDE 5 likes this one better...
             // (Plasma freezes upon app exit. with forceExit = true, it's only frozen for a minute; with forceExit = false, it's indefinite)
-            //appConfig.samples = 4; // force the AA on, if the graphics driver didn't do already
+
+            if (SharedLibraryLoader.isMac)
+                appConfig.setBackBufferConfig(8, 8, 8, 8, 16, 0, 4);
+            else
+                appConfig.setBackBufferConfig(16, 16, 16, 16, 16, 0, 4);
 
             // load app icon
             appConfig.setWindowIcon(Files.FileType.Classpath,
diff --git a/src/net/torvald/terrarum/Terrarum.kt b/src/net/torvald/terrarum/Terrarum.kt
index b06585ae8..a62c66a6f 100644
--- a/src/net/torvald/terrarum/Terrarum.kt
+++ b/src/net/torvald/terrarum/Terrarum.kt
@@ -41,6 +41,7 @@ import net.torvald.terrarumsansbitmap.gdx.TerrarumSansBitmap
 import net.torvald.unsafe.UnsafeHelper
 import net.torvald.util.CircularArray
 import org.dyn4j.geometry.Vector2
+import org.lwjgl.opengl.GL11
 import java.io.File
 import java.io.PrintStream
 import kotlin.math.*
diff --git a/src/net/torvald/terrarum/modulebasegame/gameactors/ActorConveyors.kt b/src/net/torvald/terrarum/modulebasegame/gameactors/ActorConveyors.kt
index c8b51c4ee..7e7367494 100644
--- a/src/net/torvald/terrarum/modulebasegame/gameactors/ActorConveyors.kt
+++ b/src/net/torvald/terrarum/modulebasegame/gameactors/ActorConveyors.kt
@@ -1,5 +1,6 @@
 package net.torvald.terrarum.modulebasegame.gameactors
 
+import com.badlogic.gdx.Gdx
 import com.badlogic.gdx.graphics.Color
 import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import net.torvald.terrarum.*
@@ -7,6 +8,7 @@ import net.torvald.terrarum.TerrarumAppConfiguration.TILE_SIZED
 import net.torvald.terrarum.gameactors.ActorWithBody
 import net.torvald.terrarum.modulebasegame.worldgenerator.HALF_PI
 import net.torvald.terrarum.modulebasegame.worldgenerator.TWO_PI
+import org.lwjgl.opengl.GL11
 import java.util.*
 import kotlin.math.*
 
@@ -153,7 +155,9 @@ class ActorConveyors : ActorWithBody {
         batch.end()
 
         shapeRender.projectionMatrix = batch.projectionMatrix
+            Gdx.gl.glEnable(GL11.GL_LINE_SMOOTH)
         shapeRender.inUse {
+
             it.color = COL_BELT
 
             // belt top