But CAS actually works in 3 levels of detail. First you are zoomed out to change things like clothing and accessories, change body size and shape etc. Then you can zoom in on the face to the next level where you can manipulate the head size and shape, nose, mouth ears. This level of detail wowed us at Sims camp as it was, but then Jill went another step deeper and zoomed in on each of the editable features of the face. Again, manipulation is simple, by grabbing and dragging the face structure to exactly where you want it. Even the eyes are so detailed now that you can change the size of the iris, a first for The Sims. Eyebrow arch, lip crease and the bridge of the nose can all be adjusted in minute detail.

Another Sims first is the ability to interchange boots and clothing items, they call it the Sims 4 Boot System. If your Sim is wearing long boots, they will be tucked under boot fit trousers, or fully visible if wearing shorts or a skirt. I managed to mash together an image for you to see the same pair of boots being worn in two ways.

I also made one to show you how feet and legs adjust to accommodate heels. There may be other heel heights in the final game but for now you can see how the leg adjusts to accommodate them.

Another biggie; Hair and hats can be changed independently, so you can select any hair you like and style it with any hat. The same can probably be said for other accessories but for this early build of CAS, glasses, accessories and makeup have been disabled so we couldn't play with those. Hair cannot be manipulated in CAS though, so don't expect to be able to grab hair and make it longer or fuller. This has been asked a lot. Hands can also not be manipulated (it would break the many interactions and animation based around pickup and touch).

Other details like freckles, birthmarks and tattoos are all possible according to Jill, but remain unconfirmed for the base game launch.