This page will outline how to change the various graphics of DOOM. Note that this only includes title screens, intermission screens, menu graphics, status bars, and such. All tutorials by Rellik_jmd.
If when reading these, you find what you know to be an error, send mail to us at DER.
Replacing the graphics in the DOOM series of games is very simple. So that you don't have to worry about image sizes or having the correct pallette etc, just download Wintex and rip the original graphics out of the game. You can get Wintex here. Install Wintex, then start it up.
At the top where it says Main IWAD file click the type of game you'll be working with and locate your main IWAD file. Now to change the TITLEPIC which is the big graphic that fills the screen when the game first starts, double click the DOOM or DOOM2.WAD file in the PWAD to examine or modify box. That will open up a window that looks like this:

Now click the button in the bottom row that reads GFX and all the images that are classified as game graphics will be listed. Clicking once on an entry listed on the left side will bring it up in the big right side window so you can see exactly what graphic you've selected like this:

There's our TITLEPIC, lets get it out so we can work on it. With it selected like in the above picture, go to EDIT, then hit Save entry to file. Now save it where ever you want, modify the bitmap file with whatever paint program you choose and save it again. You don't even need to save it as titlepic.bmp if you don't want.
Okay, now you've edited it to your liking, how do you get it to show up in the game?
Open up Wintex again, and click FILE, then NEW WAD. After you enter a name for your new wad it'll automatically open. there will be nothing listed in the left side menu because it is an empty file. Click the GFX button in the bottom row to switch it to Graphics mode. Now it'll ask you for the name of the new graphic, type in "TITLEPIC" or select it from the drop down box. Under the drop down box it should now say "Entry replaces an entry in IWAD", that's what we want. Now select the bitmap you made to replace the original titlepic and you're done!
Now save the wad and go load up DOOM to see your handy work. This procedure will work with any graphic in the IWAD file.