"The shadows and the textures are weaknesses of the GTA 4 PC version. All objects and characters cast shadows indeed, but they are quite "grainy” and almost scream for better filtering. Far Cry 2 for example showed similar shadow artifacts on the consoles, but they were fixed on the PC. Furthermore there are always areas with low-res textures that are an almost painfully big contrast to the nice objects. On Wednesday we will check if this visualization has been altered for the final retail version. "