IWannaBangAnastasia

So I figured out why trains aren't showing up in free roam for some of us mod users. The game engine is only able to allocate a limited amount of memory for use (even if your rig has a massive memory pool, the game will still only use a small amount of it), when the game is already using most of that memory pool, it will avoid spawning in trains to preserve the remaining available memory space. This limitation doesn't cause any issues in the vanilla game, but it becomes issue when your baseline memory usage goes up due to mods. The fix is pretty simple: you need to increase the RAM and VRAM allocation via a gameconfig.xml mod. I've been using "A Modest Memory Pool Booster for LML" from Nexus and it works great. Trains full of passengers spawn just fine now, even though I'm using about 20 different mods. Just watch out for memory-heavy mods. Stuff like 4K textures and euphoria mods will probably still mess things up. The only memory-heavy mod that I run is Enhanced Entity and World Persistence because it's too good to pass up, but even with the memory fix, I still get spawning issues when too many dead bodies pile up in one area. When that happens, no new NPCs spawn until I move away.

You can fix this issue by increasing the amount of RAM and VRAM the engine is allowed to allocate via config.xml mods like this one: A Modest Memory Pool Booster for LML - Anti-Stutter Performance Booster at Red Dead Redemption 2 Nexus - Mods and community I use it + several other mods (mostly minor gameplay rebalance/rework stuff and fixes that aren't too texture-heavy or script-heavy) and I'm able to get trains full of passengers to spawn just fine, no problem. You probably should still avoid stuff that heavily increases memory usage though such as 4k retextures and euphoria mods etc... The only memory-heavy mod that I use is Enhanced Entity and World Persistence by PixieV because it improves the game far too much, but after a particularly large amount of dead bodies piles up in a single region, new NPCs of all kinds (including new police waves) refuse to spawn until I leave the area.