If the building is one mesh and the lightmap res is only 1024 no wonder the shadows look low res. Image a single 1024x1024 texture stretched out on the whole building so that there are no repeating parts at all.
If the building is one mesh and the lightmap res is only 1024 no wonder the shadows look low res. Image a single 1024x1024 texture stretched out on the whole building so that there are no repeating parts at all.