No. You'd need to make all the meshes not overlap. Which all the meshes unfortunately do especially in the Death Marshes maps. And if you never noticed throughout the entire game there are dark lines and light bleeding in through walls if you look around a bit, but it's definitely less then however the remaster builds lightmaps. So you can:
- Somehow fix the entire level so no meshes overlap (Nope)
- Remove lightmaps all together which would make the map look worse (nope again and you can't do this in the editor)
- Create a program to read the .map files and all the static meshes in the map and create and apply your own lightmapping technique to increase the resolution of the textures and save it back out to a .map file (definitely not happening)
- Live with it because this game is not perfect (this one)
- Don't touch the map (or this)