@shorevietnam: i think ur hard artifact might hav something to do with that being the seam between 2 blocks joined together. even if u didnt put seperate blocks there urself, i think extra large surfaces are automatically split.

@orange_brat: i dont see how those artifacts could be avoided. im guessing its because the lightmaps hav a lower resolution than the actual textures, and the shadow is interpolated in between. maybe fiddle with the shadow resolution?

i could be completely wrong about these tho. its just wot i reckon.