diff --git a/common/src/main/java/com/dfsek/terra/config/builder/GeneratorBuilder.java b/common/src/main/java/com/dfsek/terra/config/builder/GeneratorBuilder.java
index 3b00f1898..570819a15 100644
--- a/common/src/main/java/com/dfsek/terra/config/builder/GeneratorBuilder.java
+++ b/common/src/main/java/com/dfsek/terra/config/builder/GeneratorBuilder.java
@@ -48,12 +48,16 @@ public class GeneratorBuilder {
 
     private double blendWeight;
 
+    private Map<String, Double> variables = new HashMap<>();
+
     public WorldGenerator build(long seed) {
         synchronized(gens) {
             return gens.computeIfAbsent(seed, k -> {
                 NoiseSampler noise;
                 NoiseSampler elevation;
                 NoiseSampler carving;
+                Scope biomeScope = new Scope().withParent(varScope);
+                variables.forEach((id, val) -> biomeScope.create(id).setValue(val));
                 try {
                     noise = new ExpressionSampler(noiseEquation, varScope, seed, noiseBuilderMap);
                     elevation = elevationEquation == null ? new ConstantSampler(0) : new ExpressionSampler(elevationEquation, varScope, seed, noiseBuilderMap);
@@ -66,6 +70,10 @@ public class GeneratorBuilder {
         }
     }
 
+    public void setVariables(Map<String, Double> variables) {
+        this.variables = variables;
+    }
+
     public void setBlendWeight(double blendWeight) {
         this.blendWeight = blendWeight;
     }
diff --git a/common/src/main/java/com/dfsek/terra/config/templates/BiomeTemplate.java b/common/src/main/java/com/dfsek/terra/config/templates/BiomeTemplate.java
index 080e3df97..c832c7d85 100644
--- a/common/src/main/java/com/dfsek/terra/config/templates/BiomeTemplate.java
+++ b/common/src/main/java/com/dfsek/terra/config/templates/BiomeTemplate.java
@@ -26,6 +26,7 @@ import parsii.eval.Parser;
 import parsii.eval.Scope;
 import parsii.tokenizer.ParseException;
 
+import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
 import java.util.Set;
@@ -42,6 +43,11 @@ public class BiomeTemplate extends AbstractableTemplate implements ValidatedConf
     @Default
     private String extend = null;
 
+    @Value("variables")
+    @Abstractable
+    @Default
+    private Map<String, Double> variables = new HashMap<>();
+
     @Value("carving.equation")
     @Abstractable
     @Default
@@ -308,11 +314,18 @@ public class BiomeTemplate extends AbstractableTemplate implements ValidatedConf
         return blendStep;
     }
 
+    public Map<String, Double> getVariables() {
+        return variables;
+    }
+
     @Override
     public boolean validate() throws ValidationException {
         color |= 0x1fe00000; // Alpha adjustment
         Parser tester = new Parser();
         Scope testScope = new Scope().withParent(pack.getVarScope());
+
+        variables.forEach((id, val) -> testScope.create(id).setValue(val));
+
         testScope.create("x");
         testScope.create("y");
         testScope.create("z");