They developed their own engine, but it's based on the Genome engine they used in GIII
Indeed, but imho the engine is either at its max, or the implementation was not perfect on this last project.
I honestly dont like its graphics implementation on risen, even with .ini tweaks and 1920x1200 with full detail. The lightning seems wrong no matter how i adjust it, the close-up textures on leafs seem just wrong also (too blurry, not enough detail).
For me, the best graphics yet is oblivion fully modded, with Quarl texture pack/LODs and a numerous other external mods.
But going back to D2, from what i saw, its pretty decent graphics also, imho better than RIsen due to the already mentioned reasons.
