Don't forget to enable it in the Resource Packs screen before loading a world.
Information
An Antique Atlas 4 addon with custom made markers for a very long and oddly specific list of modded structures.
The idea is to make new Icons for structure types, that way support for modded structures can be added by selecting an Icon that better fits the structure. 
I didn't include every single structure from the compatible mods. A good amount of them are too small or intended to look naturally generated.
The selection of compatible mods could seem a little random. I selected a very specific set of mods that I plan to use in a Modpack in the future + some suggestions and contributions from various users.
Compatible Mods
- Aerial Hell (Also with dimension icon and biome compatibility)
- Aquamirae
- Ati Structures
- Better Archeology
- Bosses of Mass Destruction
- Bosses'Rise
- Bygone Nether / Eternal Nether
- Choice Theorem's Overhauled Villages (Outposts)
- Deeper and Darker (Also with dimension icon)
- Demi's Sky Arena
- Domix's Creatures
- Dungeons and Taverns
- End Villager Outpost
- Enderscape
- Epic Jungle Temples
- Epic Witch Huts
- Eternal Starlight (Also with dimension icon and biome compatibility)
- Formidulus
- Frostiful
- Grim Kingdoms
- Hellish Trials
- Ice and Fire / Ice and Fire CE
- Illager Invasion
- Immersive Pillagers
- Incendium
- It Takes a Pillage Continuation
- L_Ender's Cataclysm
- Lios Spiral Tower Villages
- Mebahel Creatures Draugr
- Mebahel Creatures Dwarven
- Medieval Buildings
- Medieval Buildings [End Edition]
- Medieval Buildings [Nether Edition]
- Minecolonies
- Moog's End Structures
- Moog's Mineshafts Reimagined
- Moog's Nether Structures
- Moog's Voyager Structures
- Mowzie's Mobs
- Naraka
- Qrafty's End Villages
- Ribbits
- Sky Villages
- Supplementaries
- Terralith
- The Lost Castle
- Tidal Towns
- Towers of Chambers
- Towns and Towers
- Unnamed Desert
- Unnamed Sea
- Wan's Ancient Beasts
- When Dungeons Arise
- When Dungeons Arise Seven Seas
- Yeehaw Towns
- YUNG's Better Desert Temples
- YUNG's Better Fortresses
- YUNG's Better Jungle Temples
- YUNG's Better Mineshafts
- YUNG's Better Ocean Monuments
- YUNG's Better Witch Huts
Suggestions and Contributions
I believe this is the biggest RP for Antique Atlas 4 modded structure marker compatibility, but I also probably missed a good amount of popular mods (Specially Forge/NeoForge ones). So, if you want, visit the GitHub repository for contributions and suggestions.
Of course, huge thanks to all the people that made and maintain Antique Atlas 4. If it's not obvious yet I'm a big fan.
