You could try to reduce the smoothing done by lightmass. This is set in WorldSettings->Lightmass->IndirectLightingSmoothness. A value of .6 or so can work well. You may have to increase the IndirectLightingQuality to 2 or so to compensate for this.
You could try to reduce the smoothing done by lightmass. This is set in WorldSettings->Lightmass->IndirectLightingSmoothness. A value of .6 or so can work well. You may have to increase the IndirectLightingQuality to 2 or so to compensate for this.