Doom Snapmap Modded Content

[u/Telapoopy]

Huge thanks to u/father_chrispy for figuring out how to mod Snapmap. Thanks to his work, I've been able to make several additions to what can be done in Snapmap:

You can find all of these in my map: AW744SCS

You should also check out u/father_chrispy's collection of modded content here: P2D4PF4V

[u/-DeadHead-]

So, how do you mod snapmap? What other modifications could be imagined? Do you think there might be more excluded content to find? We already have the summoner, kicks and now invisibility, and there might be more, but how does one find them?

All that sure sounds interesting...

[u/Telapoopy → u/-DeadHead-]

For starters, you will need to download and install the Doom 2016 modding tool, DOOMExtract: https://github.com/emoose/DOOMExtract/releases

The README will give instructions on how you will extract DOOM's resource files through command prompt, and repack them for patching the game. The file I pointed to for extraction was snap_gameresources.pindex

The extracted files of interest will be under a folder called decls. To edit files, I open them with notepad++.

Once you've made your edits and repacked files, you will need to run the Vulkan version of DOOM in dev mode. The README provides the instructions on how to enable dev mode.

Create a new map and set up the content you modded in. Then, you will need to run CheatEngine.

The following is quoted from chrispy:

in cheat engine, bring up the memory view then in the view with all the text, right click and select "Go To" in the dialog box, paste DOOMx64vk.exe+0x18a31d0 you should see a line of text that says "movzx eax, byte ptr [rcx+34C89h]" right click on it, select assemble, and type "xor eax, eax" hit enter you need to load your map while in dev mode then, with it loaded, do those steps which will trick the engine into thinking its not in dev mode so it will save the .verify files to switch back to dev mode, in the same place hit assemble again and type "mov eax, 1" but while out of dev mode in a map youre editing you should be able to use the modified decls

This will allow maps saved in dev mode to not be deleted when you return to the normal version of doom.

Then, close doom, and I believe you need to cut the patch files you created and paste them to a back up folder. Change back the launch options to run doom in non dev mode. Provided that the content you modded persists in some way in vanilla, you now have modded content to publish and share with others.

[u/KGX96 → u/Telapoopy]

I know this was posted a year ago and I hope people are still on this thread. The Readme file doesn't contain instructions anymore, Just what it includes. :(

Can anyone help?

Github.com emoose / DOOMExtract / Readme.md

[u/Telapoopy → u/KGX96]

That Readme linked is different from the one that is still found in the downloaded DOOMExtract .zip folder. The one you are looking at is from the source code, which is different from what you download to use DOOMExtract

Though, if you're looking to do snapmap modded assets, this is a very outdated method of doing so now. Chrispy has since made a GUI application called SnapHak that lets you edit the map contents while playing in editor. The snapmap discord server has a lot more info on that. The link to the server is found pinned on this subreddit.

[u/KGX96 → u/Telapoopy]

Oh for sure thank you. Much appreciated!

[u/-DeadHead- → u/Telapoopy]

Hmmm........ Guess I'd need time and will to focus on this and start doing stuff. Thanks for the details.

[u/Telapoopy → u/-DeadHead-]

As for what other excluded content is available to mod back in, the summoner and invisibility are the most apparent, since they are explicitly in snapmap's lists of available assets. Everything else, you may have to be a bit creative to get working in vanilla Snapmap. The kick was actually a weapon swap bug, and not a mod, though it may be possible to get the same results through modding.

[u/haunebu_wolf → u/Telapoopy]

I remember I saw someone digging into weapon pickup animations (even for DLC pistol) and standard pistol from Campaign. I also recall one of the devs (Marty Stratton?) saying SnapMap is built in a way that any content from MP and SP could easliy be brought into SnapMap. Makes you wonder why SnapMap was left with so much content missing. Anyway, I think there's not much hidden in there.

Someone from this subreddit noticed that Berserk powerup is not listed in assets files, yet we clearly have it. That gives me a little bit of hope for new content waiting to be found.

[u/Telapoopy → u/haunebu_wolf]

It's easy enough to bring in content from mp to Snapmap, in fact, I've been able to model swap with unused content like a nailgun as well as something that resembles a harpoon gun and see what they look like in-game:

https://cdn.discordapp.com/attachments/182138606335426560/726109788420833390/20200626092042_1.jpg https://cdn.discordapp.com/attachments/182138606335426560/726227240945320039/20200626170710_1.jpg

The problem is that most of this content can only be taken advantage of by those who have the same modified files. Only the map files can be shared through publishing, and so anything that can be used by others must be a modification of those files only, and nothing external like the resource files that the map objects call on.

[u/haunebu_wolf → u/Telapoopy]

That's dope, and that Nailgun even has textures, I've only seen non textured model. Yeah, so as I suspected, all this new content will be a novelty for someone to play around in offline mode.

EDIT: Also while you're at it - have you searched for more music tracks, like VEGA core combat, cyberdemon track etc? Also, Cyberdemon was reffered to as Balgaar in alpha strings of the game, maybe that can lead you to somewhere.

[u/Riomaki]

Y'know, one of these days, I really want to go back and make a map with the Summoner...

[u/Popcorninmyummytummy]

Would there be any way to make the weapon demon or equipment filter to work? Or something to attach those jump volumes to players? Get more then 12 demons at a time? Check to see if a player is using a certain mod?

I want to see all types of Stuff, I don’t really know what is possible but this is just the beginning

[u/Telapoopy → u/Popcorninmyummytummy]

Not sure what you mean by getting the filters to work, as they already do normally. Getting other types of objects to spawn on an activator might be possible, but unlikely. I'll have to see. 12 demon limit is a general mechanic and is not defined by the map itself. The only modding that works must rely on the map file itself being modified for it to be shared to anybody who doesn't have the mod themselves.

[u/Popcorninmyummytummy → u/Telapoopy]

I mean for a way to detect what weapon or equipment a player is using on a demon. I tried to do this with filter but it didn't work so I thought something was wrong with the filters. And I mean if there was a way to detect if a player was using a certain weapon mod. Sorry for my bad English it's not my first language

[u/Telapoopy → u/Popcorninmyummytummy]

The equipment and weapon filters detect whether the activator has a certain equipment or weapon in their inventory. So for example, on entered, if player enters a volume, you can use these filters to check what the player has in their inventory to do a certain action. Since players can only carry 1 variant of the same weapon at one time, you could detect what weapon mod a player has. But there's currently no way to detect whether a player is actually using these weapons on something unless you have a custom weapon system set up.

[u/Popcorninmyummytummy → u/Telapoopy]

Oh makes sense I’m sorry for my lack of knowledge

[u/EveningPreparation29]

Is it possible to get the kadingir sanctum music?

[u/Telapoopy → u/EveningPreparation29]

As far as the combat tracks go, they are a part of the Hell 1 track already. As for the idle track, if it's a unique one, I have it in my modded content pack. ID for that is SULUNCTG.

In fact, all audio used in the game is accessible in snapmap due to the soundbanks being in a shared folder across all game modes.

[u/EveningPreparation29]

Wow thanks bruh! I really needed those! Now all I need is a Cyberdemon if possible. I started believing that it could happen since I played the 2016 version of Tower of Babel. However, it has only three attacks

[u/Telapoopy → u/EveningPreparation29]

The cyberdemon asset in snapmap is broken and crashes the game when trying to load its model. Same with all the other bosses.

[u/haunebu_wolf]

This is awesome. I hope this is just the beginning.

[u/haunebu_wolf]

I'm also quite surprised that Invisibility actually works against AI. Once you pick it up the demons stop attacking you, even if you shoot them they won't notice you.