diff --git a/core/src/main/java/com/seibel/distanthorizons/core/render/renderer/generic/GenericObjectRenderer.java b/core/src/main/java/com/seibel/distanthorizons/core/render/renderer/generic/GenericObjectRenderer.java
index 4e1887b8d..c1dff04d2 100644
--- a/core/src/main/java/com/seibel/distanthorizons/core/render/renderer/generic/GenericObjectRenderer.java
+++ b/core/src/main/java/com/seibel/distanthorizons/core/render/renderer/generic/GenericObjectRenderer.java
@@ -582,6 +582,7 @@ public class GenericObjectRenderer implements IDhApiCustomRenderRegister
 		
 		shaderProgram.fillSharedDirectUniformData(renderEventParam, shading, boxGroup, camPos);
 		
+		// TODO handle empty arrays (concurrency issue?)
 		for (DhApiRenderableBox box : boxGroup)
 		{
 			this.renderBox(shaderProgram, renderEventParam, boxGroup, box, camPos);