CS Basics: Introduction to the Construction Set
Introduction:
Welcome to Construction Set Basics!
If you’ve found your way here then you have likely decided to begin your journey into the wonderful world of modding for The Elder Scrolls IV: Oblivion! Congratulations! If you are a fan of the Elder Scrolls series you will find no greater joy than creating your own content and experiencing it in your game the way you envisioned it!
By now you will certainly have lots of grand ideas about all the things you’d like to create, and with some careful study of the tutorials available here on TESA you will soon achieve those goals. However, jot them down and set them aside for now! The first thing you want to do is spend some time studying the tutorials and learning how to mod, rather than stumbling through your mod idea one tutorial at a time. If you start with your ideas first the margin for error is greater and you may find yourself having to fix and even redo things later when you learn new skills. So for now, let’s focus on learning the some CS Basics!
What You Need:
- TES CONSTRUCTION SET v1.2.404 (See Part I for Install Instructions)
- OBLIVION PATCH v1.2.0416
Terms to Know:
CS- A shorthand term for Construction Set
TES- Not to be confused with CS, TES stands for The Elder Scrolls
.esp- A common file extension for mod files or Elder Scrolls Plug-ins
.esm- Another common file extension for Elder Scrolls Master files
OBSE- Oblivion Script Extender, an extension for Oblivion code scripting abilities.
About OBSE: Many modders recommend OBSE when modding for the extra scripting abilities it can add to a project, some situations may actually require OBSE to create, but to start modding with OBSE can prove difficult for some modders. Since it’s best to learn how to walk before you run, for now we will begin with standard Oblivion scripting and will discuss the benefits of OBSE in later lessons.
Part I: Installing the Construction Set
Once you download the CS Installer from the link provided it’s time to install. These steps will walk you through painlessly!
Step 1: Running the executable
The CS comes as a .exe file, meaning it’s an executable and will install almost automatically. Just download it to your desktop and click on the icon to run it. You only need the Installer not the patch.
Step 2: Accepting the Disclosure
It’s always important to have a read of these important agreements, after all they are legal contracts and when you choose “I Agree” you are binding yourself to that contract. Seems like no big deal, but if you accidentally break the terms on the contract because you didn’t read it, you could be in some trouble, so read it over and click “I Agree”.
Step 3: Finishing the Install
The CS executable will run automatically from there, detecting your Oblivion install, which needs to be complete before you install the CS. Once it’s finished, click finish and the CS icon will appear on your desktop.
Part II: Anatomy of the Construction Set
Now that you have the CS installed it’s time to load up the Oblivion master file (Oblivion.esm) and get familiar with the primary tool of the modding trade. Regardless of what you’d like to do in the modding world, sooner or later you will need the CS to make it happen, so let’s get started!
Click the CS icon on your desktop to start the program. When the CS opens you will have a total of 4 windows, 3 smaller ones nestled inside the main window. On the main window click File>Data

A new window will open, on it, check the box beside the Oblivion.esm, and ONLY this box. Then click Ok.

The CS will then load the Oblivion.esm. This may take several minutes depending on your rig, so be patient. But NEVER EVER EVER click on anything on the CS while it’s loading anything…ever. The CS doesn’t like to be bothered while it’s thinking and clicking on it impatiently can make if freeze, crash, or both, so just give it the time.
Once the Oblivion.esm is loaded, you’ll see the little windows have now become filled with interesting bits of data. Go ahead and make the main window full screen by clicking the full screen icon in the corner. Once that’s done, you can reposition the other windows to suit your taste for your workspace.
This is one configuration, you can move them around until you find the configuration that suits you:

Okay so now what are all these windows for?
This window is called the Object Window

The object window contains all objects that can be used in creating mods, including static objects, clothing, armor, architecture, creatures, NPCs, and loads more. Most things in this window can be added to the game by simply dragging and dropping them into the Render window.
This window is called the Cell View Window

The cell view window contains a list of all the cells in game, including interior and exterior cells. It also contains cells for all the various worldspaces available in the game. A cell is a canvas to build game content on. In the exterior world cells are placed side by side in a grid fashion. In the interior, a cell is a nebulous 3D space to build home/dungeon/castle interiors.
This window is called the Render Window

The render window allows you to visually navigate the Oblivion game world. By dragging objects into the render window you can add things to the game world and make mods! The render window loads cells selected in the cell window.
This window is the Main Window

The main window not only surrounds the other three windows, it also contains a number of valuable shortcuts and tools. Examine the image above carefully for the coordinating numbers for the explanations below on what these tools are!
1. Open File: A shortcut for Data>File
2. Save: Saves the active mod
3. Preference: Allows you to alter camera speed, rotation speed, etc
4. Undo: Undoes the last action (ctrl+z is the keyboard shortcut for undo)
5. Redo: Redoes the last undone action (ctrl+y is the keyboard shortcut for redo)
6. Snap to Grid: When activated snaps objects to the invisible cell grid
7. Snap to Angle: When activated snaps objects to a specific angle
8. Worldspace: Allows you to select a worldspace to view
9. Landscape: Turns on the landscaping tool (keyboard shortcut H to open)
10. Pathgrid: Turn on the pathgrid tool. when active you can place and change pathgrid nodes, but you cannot move any static objects in the render window.
11. Havoc Sim: When turned on, it will simulate the game’s havoc so will cause fires to burn and objects to fall in the Render Window.
12. Worklight: Toggles the worklight on/off in the Render Window (keyboard shortcut A)
13. Sky: Renders the sky in the exterior and in interiors where the lighting is set to behave like an exterior, can give you a better idea of how the scene will look in game, but can lag your rig so it’s best left off most of the time.
14. Leaves: When on, renders leaves on the trees in the render window. When turned off, trees will appear bare in the CS, but in game the leaves will render. Turning them off is just to conserve resources.
15. Questbuilder: Opens the questbuilding tool. The Questbuilder is used to create quests and also to add dialogue to custom characters.
16. Filtered Dialogue: Opens the filtered dialogue feature that allows you to see what dialogue each character speaks. It can be useful for tracking down dialogue your NPCs are saying. Not used for creating dialogue.
17. Script Maker: This opens the script notepad where you can view existing scripts and create your own. (See our Scripting Class for information on creating scripts)
18-24. Main Menu: These categories contain several more shortcuts to the various tools in the CS, many the same as what we’ve already reviewed; the most commonly used ones we’ve already explored on the tool bar. But these will come into play in later lessons.
This concludes the basic introduction to the Oblivion Construction Set. You should now have the CS installed, have a workspace configuration that works best for you, and should have a good basic knowledge of where everything is in the CS. Well done!
If you have questions on what we’ve covered so far, post them here in the General Questions thread, or start a new topic!
If you’re ready to move on, then head to CS Basics Lesson #1: Rendering Oblivion
Make sure you read "About the CS Basics Class" so you know what's expected of you!
















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