diff --git a/common/addons/structure-terrascript-loader/src/main/java/com/dfsek/terra/addons/terrascript/script/StructureScript.java b/common/addons/structure-terrascript-loader/src/main/java/com/dfsek/terra/addons/terrascript/script/StructureScript.java
index 032108784..bbf9394b7 100644
--- a/common/addons/structure-terrascript-loader/src/main/java/com/dfsek/terra/addons/terrascript/script/StructureScript.java
+++ b/common/addons/structure-terrascript-loader/src/main/java/com/dfsek/terra/addons/terrascript/script/StructureScript.java
@@ -105,13 +105,14 @@ public class StructureScript implements Structure, Keyed<StructureScript> {
                 .registerFunction("pow", new BinaryNumberFunctionBuilder(
                         (number, number2) -> Math.pow(number.doubleValue(), number2.doubleValue())))
                 .registerFunction("sqrt", new UnaryNumberFunctionBuilder(number -> Math.sqrt(number.doubleValue())))
+                .registerFunction("rsqrt", new UnaryNumberFunctionBuilder(number -> MathUtil.invSqrt(number.doubleValue())))
                 .registerFunction("floor", new UnaryNumberFunctionBuilder(number -> Math.floor(number.doubleValue())))
                 .registerFunction("ceil", new UnaryNumberFunctionBuilder(number -> Math.ceil(number.doubleValue())))
                 .registerFunction("log", new UnaryNumberFunctionBuilder(number -> Math.log(number.doubleValue())))
                 .registerFunction("round", new UnaryNumberFunctionBuilder(number -> Math.round(number.doubleValue())))
                 .registerFunction("sin", new UnaryNumberFunctionBuilder(number -> MathUtil.sin(number.doubleValue())))
                 .registerFunction("cos", new UnaryNumberFunctionBuilder(number -> MathUtil.cos(number.doubleValue())))
-                .registerFunction("tan", new UnaryNumberFunctionBuilder(number -> Math.tan(number.doubleValue())))
+                .registerFunction("tan", new UnaryNumberFunctionBuilder(number -> MathUtil.tan(number.doubleValue())))
                 .registerFunction("asin", new UnaryNumberFunctionBuilder(number -> Math.asin(number.doubleValue())))
                 .registerFunction("acos", new UnaryNumberFunctionBuilder(number -> Math.acos(number.doubleValue())))
                 .registerFunction("atan", new UnaryNumberFunctionBuilder(number -> Math.atan(number.doubleValue())))
diff --git a/common/api/src/main/java/com/dfsek/terra/api/util/MathUtil.java b/common/api/src/main/java/com/dfsek/terra/api/util/MathUtil.java
index 716b879af..7227d9c0e 100644
--- a/common/api/src/main/java/com/dfsek/terra/api/util/MathUtil.java
+++ b/common/api/src/main/java/com/dfsek/terra/api/util/MathUtil.java
@@ -55,6 +55,10 @@ public final class MathUtil {
         return cos[(int) (rad * radToIndex) & SIN_MASK];
     }
     
+    public static double tan(double rad) {
+        return sin(rad)/cos(rad);
+    }
+    
     public static double invSqrt(double x) {
         double xhalf = 0.5d * x;
         long i = Double.doubleToLongBits(x);