Okay. To run a console command in game, open up the level blueprint, put an "execute console command" node, hook it up to event begin play, and put your console command into the node. This will make the console command to be executed once you run the game.
@obscura That's the thing with GPULM, the settings are maxed out by default. It runs on production mode only(this is more to avoid errors the dev says) You just crank the radiosity to 10 indirect light bounces in world settings and that's it. Because it's a brute force renderer and doesn't use irradiance caching there are…