Dear Unreal Experts,
almost two years ago I started a project in which i rebuild my home city how it once looked before whole disctricts were destroyed in ww II. I plan to release this project for free one day. Now I am at a point in which I want to tweak what I created to far. I always had some nice knowledge regarding photoshop, but I never modeled in my life. I finally decided to use the easy to learn SKETCHUP since the major modeling part is about recreating buildings.
So I created many buildings, gave each part of the buildings textures in sketchup and then exported them into .FBX files. I imported the blank model (without material import) into Unreal Editor, everything worked pretty well and in Unreal Editor I created new materials with textures (such as roofs, walls, wooden parts, windows etc…). I used a “texture sample” as a “base color” in my material and gave it some roughness doesnt end up shiny. Some also use normal maps, which works quite nice. it might be a weird method, but worked pretty fine.
The problem is that these models look pretty sterile and clean. Thats why I want to add dirt, rust, patina and moss. I was going through some tutorials, but many of them look quite complicated and are different to the materials I created.
Now my question: Cant i not just add another texture layer including alpha channels (a.e. moss) on top of my my base texture layer (a.e. wood)? is there an easy method to achieve what I want to do?
Thanks a lot for replying and helping!