Increase the static lightmap resolution of the landscape? To 128 maybe. And tweaking the volumetric lightmap to get more samples (decrease Detail Cell Size) and more memory (increase Maximum Memory Data) might result in no squares.
Increase the static lightmap resolution of the landscape? To 128 maybe. And tweaking the volumetric lightmap to get more samples (decrease Detail Cell Size) and more memory (increase Maximum Memory Data) might result in no squares.