no, it's not generated from WED. after loading the level the light maps get calculated in the engine.

i use entities (small sphere models - see the white dot above) for setting the lights and they could be placed in WED of course. i didn't find a good way to access the real WED lights per script.

in the engine you can change the light position and settings and let the light map update immediately but i didn't work on a light editor yet.

...
maybe i should start a new thread about the ingame light mapper since it is work in progress and not directly related to the two plugins of this thread.