diff --git a/core/src/main/java/com/boydti/fawe/command/CFICommands.java b/core/src/main/java/com/boydti/fawe/command/CFICommands.java
index a54c9caa..31d3da59 100644
--- a/core/src/main/java/com/boydti/fawe/command/CFICommands.java
+++ b/core/src/main/java/com/boydti/fawe/command/CFICommands.java
@@ -686,6 +686,7 @@ public class CFICommands extends MethodCommands {
             usage = "<url>",
             desc = "Color terrain using glass"
     )
+    // ![79,174,212,5:3,5:4,18,161,20]
     @CommandPermissions("worldedit.anvil.cfi")
     public void glass(FawePlayer fp, BufferedImage image, @Optional BufferedImage imageMask, @Optional Mask mask, @Switch('w') boolean disableWhiteOnly) throws ParameterException, WorldEditException {
         CFISettings settings = assertSettings(fp);
diff --git a/core/src/main/java/com/boydti/fawe/object/collection/SummedColorTable.java b/core/src/main/java/com/boydti/fawe/object/collection/SummedColorTable.java
index d3b07bed..1bb13c7c 100644
--- a/core/src/main/java/com/boydti/fawe/object/collection/SummedColorTable.java
+++ b/core/src/main/java/com/boydti/fawe/object/collection/SummedColorTable.java
@@ -1,5 +1,6 @@
 package com.boydti.fawe.object.collection;
 
+import com.boydti.fawe.util.MathMan;
 import java.awt.image.BufferedImage;
 import java.awt.image.DataBufferInt;
 
@@ -172,7 +173,7 @@ public class SummedColorTable {
         float factor = this.areaInverses[area - 1];
         float alpha = (totAlpha * factor);
         factor = (factor * 256) / alpha;
-        return ((int) alpha << 24) + (((int) (totRed * factor)) << 16) + (((int) (totGreen * factor)) << 8) + (((int) (totBlue * factor)) << 0);
+        return (MathMan.clamp((int) alpha, 0, 255) << 24) + (((int) (totRed * factor)) << 16) + (((int) (totGreen * factor)) << 8) + (((int) (totBlue * factor)) << 0);
     }
 
     private long getVal(int row, int col, int index, long curr, long[] summed) {