Baked GI -- seams in modular walls

Unity Engine
1

Using Unity Version 5.3.1p2

I’ve been investigating baking lightmaps for our current project. So far it has been more than a little frustrating. I’m hoping I am just missing some important information or tips and will be able to get better results.

The main issue I am trying to solve currently is that there are visible seams between modular wall pieces. This has been my best result to date, but still not shippable.

2508652--173576--seam.jpg
2508652--173576--seam.jpg1919×1080 696 KB

Textures
My textures all tile seamlessly and everything looks great when using the Precomputed Realtime GI

2508652--173577--textures.jpg
2508652--173577--textures.jpg750×504 137 KB

UVs
In the screenshot above I am using lightmap UVs I created myself in Maya. Not the greatest pack, but ample room to prevent any bleeding from other shells.

I have also tried creating them using Generate Lightmap UVs inside the model’s properties – still had seams

Also tried using Preserve UVs inside the instance’s Object settings using my Maya uvs – still had seams

2508652--173578--lightmap.jpg
2508652--173578--lightmap.jpg904×816 81 KB

Settings

Here are the settings I’ve baked with. I have tried numerous other settings – increasing Baked Resolution, decreasing it, increasing Indirect Resolution, decreasing – basically I’ve noodled any parameter I could.

2508652--173580--setting.jpg
2508652--173580--setting.jpg380×824 87.4 KB

Hoping someone can shine some light on what I am doing wrong, or at least confirm they are also having the same issues.

2

Try witching of mipmaps on texture and generated lightmaps

3

The only solution I have found is to increase the scale of the mesh in the lightmap until the seams are no longer visible. I have spent countless hours with other settings with no luck when it comes to baked GI issues at the seams.

4

@idurvesh – We have tried fooling around with the mipmapping. But I’ll take another look and give that a try. Thanks for the suggestion.

@ArachnidAnimal – Yikes, glad to know I not the only one who’s spent so much time trying for no seams. I’ll try this out today. Thanks a lot!

5

hey dude - did you ever figure this out? am having the the same issues on my modular meshes and i cannot get rid no matter what settings i change… :frowning:

6

One way to “fix” this a little bit is to increase pack margin for automatic lightmapping (select model in the Project window - Lightmapping settings > Pack margin). Set to 8 or more, seems to fix the problem a lot of the time.