No, it doesn't render okay. There is no backplate for WarriorDL's helmet, just the front mask and the samurai hood-thingy.

I'd recommend visiting Sci-Fi 3D and downloading one of the many fine Vader figures available there in .3ds format, in order to salvage the helmet, but some assembly would be required.

All of the Vader files import into Poser with the mask portion of the helmet offset to the left. However, you could use the grouping tool to select and spawn new props for both helmet and mask, then move the pieces into alignment.