Crank those lightmass settings man! indirect quality = 10, bounces = 100, lighting level scale I use .6 or lower, smoothness .6 or lower. Prepare for long lighting build but it’s going to improve quality by a lot. I’ve tweaked Koola’s settings in his demo with those and I got even better results than him!!! and I use default production ini, not the tweaked one by koola (anyway he already stated he used completely random values).