How can I get this kind of shuttered glass effect in Unreal or Substance Painter?

SwordOfPeace

I'm trying to achieve the exact same effect seen in the left corner. I have cracked glass pieces modeled similarly, but my technical art side not strong enough to find correct way to do it. I’m struggling to figure out how to get this result.

Eric Chadwick

Here's something I made that might help. It's a bit stylized, but the idea might help you.





Interactive demo:
https://github.khronos.org/glTF-Sample-Viewer-Release/?model=https://raw.GithubUserContent.com/KhronosGroup/glTF-Sample-Assets/main/./Models/GlassBrokenWindow/glTF-Binary/GlassBrokenWindow.glb

Some explanation, and you can download the model here too:
https://github.com/KhronosGroup/glTF-Sample-Assets/tree/main/Models/GlassBrokenWindow#description

SwordOfPeace

Thank you! I assume this one uses a flat plane for the window, but I got the idea. I’m using a thin box as the window and applied a Voronoi fracture for the broken parts. After creating a good glass material shader in Unreal, I can add an alpha texture like this in Substance Painter for more detailed effects. Thanks again for your response!

Eric Chadwick

Yeah, it’s a plane, only two triangles. To make the textures I used a voronoi fracture system, tweaked the rotations a bit (for a better normal map) then baked it out to textures.

SwordOfPeace

Thanks a lot! I'm planning to use a thin box geometry. Will this technique work the same way?

Eric Chadwick

Try it and see! I imagine it will work, but you’ll likely have to tweak things.