Done basic documentation. Further expansion may be needed. Maybe. But only maybe.

RecrownedAthenaeum/UI/Modular/UIModuleGroup.cs

@@ -16,10 +16,19 @@ namespace RecrownedAthenaeum.UI.Modular
         List<UIModule> modules = new List<UIModule>();
         Rectangle scissorBounds;
         RasterizerState scissorRasterizer = new RasterizerState();
+        /// <summary>
+        /// Camera used by the module for cropping.
+        /// </summary>
         public Camera2D Camera { get; set; }
 
+        /// <summary>
+        /// Creates a module group.
+        /// </summary>
+        /// <param name="crop">Whether or not to crop out of bounds. Default is false.</param>
+        /// <param name="camera">What camera to use for cropping. Default is null.</param>
         public UIModuleGroup(bool crop = false, Camera2D camera = null)
         {
+            if (crop && camera == null) throw new ArgumentException("Cannot crop without camera.");
             Camera = camera;
             if (crop)
             {