Loading Screen Images
Notes/Tips
Loading screen images have a resolution of 1024x512. The odd aspect ratio should be okay when the image is displayed in-game. It's probably for supporting widescreen displays as the left and right sides will be clipped in-game on normal (4:3) aspect ratio displays.
The outer area of the loading screen has no colors; it is only composed of an outline of the starting image. The outlines are created with a find edges filter.
High luminance (white) portions of the starting image should be made transparent so that the underlying paper can be seen instead.
The outlines on the inner area are thicker than those of the outer area.
There are two regions where the opacity is reduced so that only the paper background is visible. One is for the "Loading..." bar, and the other is for the tip.
The inner border and paper textures can be gotten from a PhotoShop image included with Oblivion at \textures\menus\loading\load_troll.psd. Use an unpacker to extract this file from Oblivion - Textures - Compressed.bsa.
Alpha channels are not used for the final image.
Loading screens are compressed using the DDS DXT5 format with no MIP-maps.
An image editor with good support for layers (PhotoShop or Paint Shop Pro) is a must for creating loading screens.
Loading screens will only work if placed in Oblivion\Data\Textures\Menus\Loading. This is case-sensitive!
Step-by-Step Guide using Paint Shop Pro 10
WIP
Scripts
Scripts (or macros) can be used to automate the process of creating a load screen. Preferrably, they allow one to start with a screenshot from the game and turn that directly into an image in the same style as Oblivion's load screens.
Paint Shop Pro 10
Download the script here.
Before you can run the script, you must open the load_troll.psd mentioned in the notes. Then load the image you want to convert to a load screen. You cannot have any other images open, or this probably won't work. Finally, run the script provided (File>Script>Run), and after a few seconds, you should have a pretty loading screen ready for conversion to DDS.
If you run the script in interactive mode (that's the default), you'll be prompted to set the luminance ramps for a couple parts of the image during the script execution. The first is for tweaking the outline "sensitivity"; more contrast here is usually best. The second is for the opacity of the colors in the center area. You may also want to tweak the saturation layer opacity for said colored center area. However, the defaults should work well for 90% of screenshots.
PhotoShop
(Somebody do this. I don't use or like photoshop.)
Modding and DDS Conversion
This part isn't too hard, but you must follow the directions closely as it's easy to mess up. Once you have your image the way you want it to look in the game, you'll need to save it as a DDS file using one of the DDS_Tools. When you go to save as a DDS format file, you're presented with a plethora of options, but there are only a couple you'll need to change. One is to set the format to DXT5 as that is what the original loading screens use. The other is to set MIP-maps to No; they won't be needed for a non-3D texture and just add to the file size. Save the file to your Oblivion directory in Data\Textures\Menus\Loading. If you have to create the directories, make sure to match the case. If you aren't creating the directories, still make sure the case matches.
Now you only need to make the game recognize the new loading screen image. You'll need the Construction Set, of course. So, open that up. In the Object Window, go to Miscellaneous>LoadScreen. If you see a list of all the loading screens already in the game, you're in the right place. To add a new one, right-click and then select New. Give your new loading screen a unique ID first. It's usually your name, initials, or alias; the name of the mod; and the name of the object. This ensures that your ID is unique. Then add the image; this is rather straight-forward. The loading screen text is not required, but you can fill it in if you like. It's perfect for adding tips about a mod if you're not just modding the loading screens. If you want the loading screen to only show for a particular cell, add the cell to the form list by dragging it from the Cell edit dialog which is found under World>Cell. You're done, so hit OK and save.
To test your loading screens, it's best to add a particular cell to the form list when you're editing. That way, you can just go to that cell and not have to wait for the loading screen to come up randomly. If the tip you entered shows but the image is the default Elven Armor one, you missed a step earlier and you'll need to go back over them.