Lighting resolution not taking effect with brushes?

I am getting non-realistic shadows after having build lightning with the preview configuration:

As can be seen in the picture, the lightmap resolution is set to 128; if I set it any higher and click build, it is reset to 0 and no light can be seen on the floor. What is that about?

Hi Univise,

With BSP brushes you can’t use normal resolutions like you would with Static Meshes. You have to use lower values to get higher quality.

Have a look at the Lighting Troubleshooting Guide I put together here: A new, community-hosted Unreal Engine Wiki - Announcements - Epic Developer Community Forums

I hope this helps.

Tim