diff --git a/src/main/java/com/dfsek/terra/biome/failsafe/FailoverGenerator.java b/src/main/java/com/dfsek/terra/biome/failsafe/FailoverGenerator.java
index 100668163..6badad8e1 100644
--- a/src/main/java/com/dfsek/terra/biome/failsafe/FailoverGenerator.java
+++ b/src/main/java/com/dfsek/terra/biome/failsafe/FailoverGenerator.java
@@ -7,7 +7,7 @@ import org.polydev.gaea.world.palette.Palette;
 import org.polydev.gaea.world.palette.RandomPalette;
 import parsii.tokenizer.ParseException;
 
-import java.util.Collections;
+import java.util.HashMap;
 import java.util.Random;
 import java.util.TreeMap;
 
@@ -19,6 +19,6 @@ public final class FailoverGenerator extends UserDefinedGenerator {
     }
 
     public FailoverGenerator() throws ParseException {
-        super("0", null, Collections.emptyList(), palette, new TreeMap<>(), false);
+        super("0", null, new HashMap<>(), palette, new TreeMap<>(), false);
     }
 }
diff --git a/src/main/java/com/dfsek/terra/config/base/ConfigPack.java b/src/main/java/com/dfsek/terra/config/base/ConfigPack.java
index 93a4830b3..c7437dc10 100644
--- a/src/main/java/com/dfsek/terra/config/base/ConfigPack.java
+++ b/src/main/java/com/dfsek/terra/config/base/ConfigPack.java
@@ -34,6 +34,7 @@ import java.util.HashMap;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Objects;
 import java.util.Set;
 import java.util.logging.Level;
 import java.util.stream.Collectors;
@@ -63,7 +64,7 @@ public class ConfigPack extends YamlConfiguration {
     public final boolean vanillaMobs;
     public final boolean preventSaplingOverride;
 
-    public final Map<StructureTypeEnum, StructureConfig> locatable = new HashMap<>();
+    private final Map<StructureTypeEnum, StructureConfig> locatable = new HashMap<>();
     private final Map<String, OreConfig> ores;
     private final Map<String, PaletteConfig> palettes;
     private final Map<String, CarverConfig> carvers;
@@ -74,6 +75,7 @@ public class ConfigPack extends YamlConfiguration {
     private final TreeRegistry treeRegistry = new TreeRegistry();
     private final FloraRegistry floraRegistry = new FloraRegistry();
     private final Set<StructureConfig> allStructures = new HashSet<>();
+    private final Map<String, Double> definedVariables = new HashMap<>();
     private final File dataFolder;
     private final String id;
 
@@ -106,6 +108,20 @@ public class ConfigPack extends YamlConfiguration {
                 Debug.info("Overriding Vanilla tree: " + entry.getKey());
         }
 
+        if(contains("variables")) {
+            Map<String, Object> vars = Objects.requireNonNull(getConfigurationSection("variables")).getValues(false);
+            for(Map.Entry<String, Object> entry : vars.entrySet()) {
+                try {
+                    definedVariables.put(entry.getKey(), Double.valueOf(entry.getValue().toString()));
+                    Debug.info("Registered variable " + entry.getKey() + " with value " + entry.getValue());
+                } catch(ClassCastException | NumberFormatException e) {
+                    Debug.stack(e);
+                    throw new ConfigException("Variable value " + entry.getValue().toString() + " could not be parsed to a double.", getID());
+                }
+            }
+        }
+
+
         abstractBiomes = ConfigLoader.load(new File(file, "abstract" + File.separator + "biomes").toPath(), this, AbstractBiomeConfig.class);
 
         biomes = ConfigLoader.load(new File(file, "biomes").toPath(), this, BiomeConfig.class);
@@ -178,6 +194,10 @@ public class ConfigPack extends YamlConfiguration {
         return id;
     }
 
+    public Map<String, Double> getDefinedVariables() {
+        return definedVariables;
+    }
+
     public Map<String, BiomeConfig> getBiomes() {
         return biomes;
     }
diff --git a/src/main/java/com/dfsek/terra/config/genconfig/biome/BiomeConfig.java b/src/main/java/com/dfsek/terra/config/genconfig/biome/BiomeConfig.java
index cc98c67ba..32a044b85 100644
--- a/src/main/java/com/dfsek/terra/config/genconfig/biome/BiomeConfig.java
+++ b/src/main/java/com/dfsek/terra/config/genconfig/biome/BiomeConfig.java
@@ -21,7 +21,6 @@ import parsii.tokenizer.ParseException;
 import java.io.File;
 import java.io.IOException;
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 import java.util.Objects;
 import java.util.TreeMap;
@@ -172,7 +171,7 @@ public class BiomeConfig extends TerraConfig {
 
         try {
             // Get UserDefinedBiome instance representing this config.
-            UserDefinedGenerator gen = new UserDefinedGenerator(eq, elevation, Collections.emptyList(), palette.getPaletteMap(), slant, getBoolean("prevent-smooth", false));
+            UserDefinedGenerator gen = new UserDefinedGenerator(eq, elevation, config.getDefinedVariables(), palette.getPaletteMap(), slant, getBoolean("prevent-smooth", false));
             gen.setElevationInterpolation(doElevationInterpolation);
             this.biome = new UserDefinedBiome(vanillaBiome, dec, gen, getBoolean("erodible", false), biomeID);
         } catch(ParseException e) {
diff --git a/src/main/java/com/dfsek/terra/generation/UserDefinedGenerator.java b/src/main/java/com/dfsek/terra/generation/UserDefinedGenerator.java
index eadc45f58..e44770a4e 100644
--- a/src/main/java/com/dfsek/terra/generation/UserDefinedGenerator.java
+++ b/src/main/java/com/dfsek/terra/generation/UserDefinedGenerator.java
@@ -17,7 +17,6 @@ import parsii.eval.Scope;
 import parsii.eval.Variable;
 import parsii.tokenizer.ParseException;
 
-import java.util.List;
 import java.util.Map;
 
 
@@ -39,8 +38,11 @@ public class UserDefinedGenerator extends Generator {
     private boolean elevationInterpolation;
 
 
-    public UserDefinedGenerator(String equation, @Nullable String elevateEquation, List<Variable> userVariables, Map<Integer, Palette<BlockData>> paletteMap, Map<Integer, Palette<BlockData>> slantPaletteMap, boolean preventSmooth)
+    public UserDefinedGenerator(String equation, @Nullable String elevateEquation, Map<String, Double> userVariables, Map<Integer, Palette<BlockData>> paletteMap, Map<Integer, Palette<BlockData>> slantPaletteMap, boolean preventSmooth)
             throws ParseException {
+        for(Map.Entry<String, Double> entry : userVariables.entrySet()) {
+            s.getVariable(entry.getKey()).setValue(entry.getValue()); // Define all user variables.
+        }
         Parser p = new Parser();
         p.registerFunction("noise2", n2);
         p.registerFunction("noise3", n3);