Fallout 4 is just a few days from release, and the hype train is roaring into the station. Bethesda titles are particularly interesting for PC hardware websites because they tend to find a way into our benchmarking suites. They're relatively demanding, open world titles that are built with a unique engine, and they are popular. They are very, very popular. Skyrim is still in our lineup even though it launched four whole years ago (although that is mostly because it's our last DirectX 9 representative).
Being a demanding, open world title means that it has several interesting features. First, it has full time-of-day lighting and weather effects, which were updated in this release with enhanced post processing effects. A bright, daytime scene will have blue skies and a soft fog that scatters light. Materials are developed using a “Physically Based Shading” model, which is more of an artist feature, but it tends to simplify asset creation and make it much more consistent.
They also have “dynamic dismemberment using hardware tessellation”. In other words, GPUs will add detail to models as they are severed into smaller chunks. Need I say more?
A lot of these features are seen in many other engines lately, like Unreal Engine 4, so it shouldn't be too surprising. Bokeh Depth of Field is a blurring technique to emulate how camera apertures influence out-of-focus elements. This is most obvious in small highlights, which ends up taking the shape of the camera's aperture. If a camera uses a six-blade aperture, then blurred point blooms will look like hexagons. This is very useful to emulate film. They also use “filmic tonemapping”, which is another post process effect to emulate film.
Fallout 4 seems to be making use of high-end DirectX 11-era features. While this means that it should be about the best-looking game out there, it also holds a lot of promise for mods.
As you're well aware, Fallout 4 ships on November 10th (and screenshots have already leaked).