Christian, your renders are really, really good. In fact, the ones of the ship underway look more realistic than stills from the Cameron movie, which can be a little too "painterly," if you know what I mean. I'm especially impressed that you held the saturation down, avoiding that fake picture-postcard look of so many renders.
The pic of the First Class dining room's buffet is spectacular! What on Earth did you use as a reference? I don't recall ever having seen a photo of it, on Titanic OR Olympic.
Great work, and I hope you'll show us more.