Things You'll Need
Instructions
Download "Custom Paintings" and open it with a unzipping program, such as 7-Zip or WinRar. Drag and drop the contents of "Custom Paintings" into the game's data folder. By defaults, it's located at "C:\Program Files (x86)\Bethesda Software\Oblivion\Data."
Start "Oblivion" and, from start-up menu, click "Data Files." Put a check next to "Custom Paintings." Now the mod is installed.
Open an image editing program that can save files in the ".dss" format. "Photoshop" has this capacity as do the free programs, "GIMP" and "DXTBmp."
Load an image you want to include as a painting in "Oblivion." Alternatively, draw one of your own. The image must be 256 pixels by 256 pixels. If it's too large or small, highlight it by clicking "CTRL" and "A" simultaneously. Use the resize tool to adjust it to the proper proportions.
Click "File" and then "Save." Name it "CustomPaintingXXX.dds"--where "XXX" is replaced with a number, such as 6 or 348. Save the file to the directory "C:/Program Files (x86)\Bethesda\Oblivion\Data\textures\furniture\ol_custompaintings."