HammUEr, a Source/idTech2-4 engine map importer and texture tool for Unreal Engine 4 & 5

Combine the best of both worlds when working on your 3D game!

The ease of BSP level construction with tried and tested tools can now be married to the power, speed and high performance of the Unreal Engine.

HammUEr is a (currently windows only) plugin that lets you build your levels with Valve's Hammer map editor, Doom3's DoomEdit, or an idTech 2-3 (Quake 1-3 and derivative games) map editor like Radiant, Jackhammer or Trenchbroom. With just a few simple clicks, you can have them imported into your Unreal Engine project as a collection of meshes. Want to change something? Make your edits in your favourite tool, then save, re-import, and you're done.

During the importing process you can assign materials already in your project to the original material names, or if you have the source images - (TGA/BMP/PNG/JPG)/VTF&VMT(Source)/MTR(D3)/SHADER(Q3)/WAD(Quake1 & Halflife)/WAL(Quake 2) - you can import them into UE as material instances based on a template material of your choice, and let HammUEr automatically find and assign the right ones. Don't want certain materials to show? Mark them no-draw and HammUEr will automatically not build sides for them!

Want to start building a level in Hammer with your UE materials for true WYSIWYG level editing? HammUEr can do that by exporting your UE material textures to VMT/VTF combos for easy use in Hammer with one click.

Have Source models you created for your maps? HammUEr can bring them into Unreal Engine for you and places them where they belong.

Use overlays and decals? HammUEr will also import those for you.

This plugin is now in maintenance mode. I'll fix large bugs, and try to update for newer engine versions when I find the time, but no new features will be added.

Third party libraries

From the Back To School updates for 4.26 and 4.27, HammUEr was switched from using homebrew VTF reading and writing code to using an version of VTFLib, updated to compile on more recent Visual Studio versions, which can be found here.

Terms of use

You are allowed to use HammUEr to import maps, textures and models you created, or have written permission for, as you need to acknowledge multiple times in the plugin itself.

You are not allowed to use HammUEr to infringe anyone else's copyrights by importing their maps, textures or models, and redistributing or selling the result, because that would be theft and illegal.

Remember, you're responsible for anything you do with HammUEr, and I'm in no way liable for any fallout that might occur as a result of your actions.

This means no fan "remakes" in UE4/5 of someone else's game, people.

You're also not allowed to resell or redistribute HammUEr or any part of the code (not in the Runtime section) or library to third parties. You are allowed to make modifications​ to your copy of the plugin source to integrate HammUEr into your own pipeline, though.