Unkwown issue with lightmap

Development Rendering
1

Hello everyone!

I am stuck with an issue when importing my assets from 3dsMax and creating lightmaps for them.

As you can see in the pictures, after building the lightmap, the shadows that I expect to find are not as anything you could describe. First I thought that it could be an overlapping error (I am quite new with Unreal and for now is my fearest enemy) but I checked the unwrap process and managed to elude the “overlapping error” so my chances to know where the problem is are very low.

I am using a Directional Light and a Skylight (as the blank new project appears when started), in case that data could be of use for knowing the solution.
Any help with detecting the problem will be very wellcome.

Thank you all in advance!

2

Your lightmap resolution is too low on the floor

3

Hi darthviper107, thank you for your answer.

I had it set in 128 and changing it to 1024 solved the problem. Thank you so much!
Since now I will be more careful with that.

Thanks!

4

Is the floor a BSP or a mesh?
Turns out, for BSPs, you want smaller values (like 4) for resolution; for meshes, you want larger values.

5

Indeed.
In the context of BSP, the resolution value describes the distance between sample points. Thus, lower values = higer resolution.

6

Thank you both for the advice, jwatte and KVogler.
In this case it was a mesh, but I also work with BSP. I will consider that fact in future works.