Light Bleeding In UE4

Hi there I recently have been trying to make some objects and have had some problems with light bleeding on objects.

This shows 2 walls placed together with a light bleed down the centre. I’m not sure what is causing this, I have checked many videos. Here are the things that I have done…

  • The world lightmass settings are 1, 3, 2, 0.6 which I checked in a previous video which apparently helps with bleeding.
  • The Light is a stationary light.
  • The lighting is building at production quality.
  • My custom light map is aligned to the grid in maya with the grid lines every 0.0161 units.
  • The lightmap on the object is at 128 resolution.

Here is my light map in UE4. Anyone have any ideas what may be causing the bleed? Do I have certain units wrong? Or am I setting up lightmaps wrong? I’m fairly new to light maps.

Think I fixed it, increasing the lightmap resolution to 256 solved it.