how do people break the texture repetition when making modular assets in ue?

hegvbwkeuyrv

so im making an environment which has a brick wall. Im planning to make a wall (modular) which i can replicate in UE4. Some questiion:
1. does the wall has to be square? does it has to occupy the 0-1 uv space?
2. and cuz its the same texture, how do you actually make in unique in ue4? ive heard some tehcnique about vertex painting?? how does it works :c especially on modular assets

Obscura

Please do some research before making this kind of topics. These are very well covered ones on the internet, there are countless amount of videos and papers about them, and they are not hard to find. Just type "unreal engine vertex paint" "unreal engine modular texturing" etc...

Zack Maxwell

2. and cuz its the same texture, how do you actually make in unique in ue4? ive heard some tehcnique about vertex painting?? how does it works :c especially on modular assets

Vertex painting is the way to go. I'm foggy on the details, but basically you blend two texture sets inside the material based on vertex color, then inside the scene you can paint the vertices on the mesh, adjusting the blend of the two texture sets.

Also, you want the base material(s) to be relatively simply in order to avoid repetition when viewed at a distance. If you have complex details, people will easily see patterns in them, and thus a clearly repeating pattern.

hegvbwkeuyrv

@grimwolf oowh okay thanks man! does that mean that after i created a procdural texture from substance designer and apply in to unreal engine, i need to make another material instances for that vertex paint? is the concept similar to layer mask in photoshop?

Zack Maxwell

Vertex painting changes vertex color on the mesh itself. It's something stored on the mesh, which the material is able to read.

Zack Maxwell

As for #1, the tiling on the mesh is controlled by the UVs. If the mesh is not a square shape, then you can adjust how the material tiles across it by extending the UV beyond the 0-1 space.
If you had a Wall that is twice as long as it is tall, for example, then you could double the width of the UV beyond the 0-1 space to have the material tile twice over.
If you do this though, you'll need a second UV set for lightmapping which remains within the 0-1 space, without overlapping UV islands.

hegvbwkeuyrv

so different vertex color means different material instances being applied to that specific vertices is it? If its twice as tall as it is wide, does that mean i can make it vertically beyond 0-1?

Zack Maxwell

https://docs.unrealengine.com/latest/INT/Engine/UI/LevelEditor/Modes/MeshPaintMode/VertexColor/MaterialSetup/Color/

KurtR

The link Grimwolf provided is the one to read, but also check youtube if you need some time to internalize the process.

https://www.youtube.com/watch?v=dghCetkArJI&t=256s