I made my asstets at blender. What is better ? Make textures UV at Blender or Unreal ?
Or this ? All make at Blender ? This are perfect references. Building will be entry avaible for player.
Or I have use unreal material with decals ?
Typically, you will do most of the work in Blender, including laying out UV coordinates.
For textures that must match up the model (baked windows and such,) the textures are also pre-prepared in something like Photoshop, before being UV-mapped in Blender.
For the rust damage, however, and for other appliqes (like wall grafitti, signs, water damage, …) you can use decals. It’s totally OK to have a “good looking” fence piece, and then add some “rust” decals on top of it.
Another common approach is to have a material with a few different looks (distressed, wet, etc) and use a material parameter, or vertex colors, to “paint in” variation between the looks. This needs coordination between the available textures, the material you make in Unreal, and the level preparation/layout, but it can make a single asset be re-used much more without becoming obviously repetitive.
If understand correctly you want retro style shading. There is a post process shader set up that can be downloaded from github that does this.
On the picture down I have already this shader. 1-2 fog 3-4 without fog.
I need strategy plan how make this level. What do with blender and what do with unreal engin.