*@Artur Machura* The reason why the base resolution is not changing and hidden geometry in edit mode is not hidden in sculpt mode is because you are sculpting on the subdivided version of the object.
The "Sculpt" slider is there to define on which subdivision level you are sculpting when entering sculpt mode.
Sculpting on subdivsions will not translate to the lowest resolution automatically. I'm sorry, I forgot to add additional info to the chapter description. In Blender 2.81-2.83 the multires modifier lost the "Sculpt" slider.
So when entering sculpt mode you will always sculpt on the highest subdivision and if you want to sculpt on the base resolution of the object you need to disable the modifier temporarily. Adding the button to quick favourites will help to make this easier.
It's still inconvenient but if you download the experimental version of 2.90, the multires modifier is finally fixed.

*@Julien Kaspar* Thank you. So obvious, why haven't I thought about it. Thank you for the quick reply.

*@Artur Machura* It's obvious once you know it ^^
I will do my best to update some of these videos soon to have this info already in the tutorials.

*@Julien Kaspar* I don't think a lot needs to be updated and it that fix would get its way to 2.83 than probably it could stay as it is. This is the first time I get to the point I didn't know what to do but at this same time, I am not a total beginner so as you put it I may know things that for me are obvious now and I overcome other problems that could be difficult for others.

Any new chapter soon on the horizon?

*@Artur Machura* No new chapter yet. Other projects got more priority and I don't know when I can return to the other chapters.

*@JacoFourienwu* Nevermind i figured it out the 2 values of my shapekeys were different values when i tried to combine it

*@andreanselmo100* That is actually a really good question. If you delete one side, mirror the other and flip the normals manually, then the details from the multires modifier will be broken.
I found a workaround that I should include in this video soon:
In edit mode press F3 and search for "Symmetrize". You can then define which side get's mirrored and it will not break the multires details.
it will still break all Shapekeys though if you have any.

*@Julien Kaspar* Thank you!

*@Sosa* Hopefully it will soon get simpler but so far you have to do it like this: https://github.com/adam-p/markdown-here/wiki/Markdown-Cheatsheet#images

You essentially just embed an image that is already uploaded somewhere on the internet.

*@Nly Arivony* I think I did a poor job explaining this in the introduction of the chapter.
To reiterate on the reasons why this step exists in the character creation:
In past movie productions it happened that we designed, modeled and rigged a character before even figuring out the exact animation style. This caused huge problems during the animation, since the model was not fully supporting all the deformations that needed to happen.
Doing some early expression tests for sculpting has 3 purposes.

• You end up with a set of sculpted expressions that will be a style reference for rigging and later the pose library in the animation.
• Any facial proportions that are not working well can still be tweaked so that they won't become an issue later (Like misplaced eyebrows or too small teeth)
• The amount of compression, stretching and creases will help to later retopologize a more optimal model for rigging to capture not just the shapes of the resting pose but all possible and planned shapes of the animation.

Unfortunately there won't be a rigging tutorial attached to this character but the animation fundamentals course might still add some videos using the Rain rig :)

*@Julien Kaspar* thanks a lot

*@madonna* Perhaps you right clicked on the name instead of the value of the shapekey?
I'm also going to make an update video on this but as a tip: Use the "Copy as New Driver" and then just paste the driver on the other shapekeys instead of going through all the steps manually.
This will save a lot of time.

*@Julien Kaspar* Hi Julien, you are right!. Thank you very much to your response. I also tried to downgrade Blender but nothing change. it is very much aha! Once you told me it is very much easy... I can keep going on the tutorial now. Thank you very much again!