Hello guys, I can't be more specific about title, as I am trying to get my 3D model into Unreal Engine.
At this state, I got mostly (in terms of static wall) finished work, which I separate and clear topology. Few points I would like to ask before exporting this out. Lets aim for walls, no doorframes, windows, etc., just plain walls made of bricks and plaster.


I am probably going to use world aligned textures and vertex painting (hence the dense loops). Would it be better to separate the pieces and export them, afterwards somehow conncet the pieces back in UE, or should I arrange them back in 3DS Max and export it together (as multiple separated objects in one fbx)?
As far as I am aware, world aligned textures do not require meshes to be unwrapped, so maybe skip unwrapping for walls? Altought I might be mistaken, correct me please if I am wrong. Also I might as well use EasyMapping plugin, which combines displacement, vertex painting and world aligned textures, hovewer it does have issues with different smoothing groups. Thats is something I have to tackle yet.
For texturing, Substance Designer seems as best option, but another question is, into how many sub-pieces do I need to separate my pieces. Is this too much, is it optimal, or should I connect it together and only assign different materials to it?


I am also posting the .max file with the whole scene to preview. If there are parts, which are done poorly, or you would change topology, such as window holes, doorframes etc., please let me know if I am doing some mistakes. As for modularity, I am going to use it for windows, but there are many parts, which are bended, twisted or different and unique in some way. Therefore, I'd start with walls to see what comes of it and then continue with it.