You guys determined that, for 300 subscribers (Via this poll), I should make a skinning tutorial. First of all, this tutorial is for MC Skin 3D, a generally Windows-only program. There are ways to have it on mac but it crashes frequently and you will lose progress from these crashes.
An intro to color and the color wheel
To begin, I will talk about color. Certain colors compliment each other, and others work nicely for "Hue shift" (See below for more on hue shifts). This is determined mainly by a color wheel.

Colors directly across from each other usually go together if, say, you were making an outfit. I'll use my pizza delivery guy as an example skin throughout this.

Accents - You can see that the main color is red, and the accent color (Hat rim, sleeves) I chose was green. That's because they go together. As you can see on the color wheel, red and green are directly across from one another, meaning they compliment each other.
The same with purple and yellow, and blue and orange. Using these when making an outfit for a skin can be helpful. When making a color, be sure to adjust the saturation to be a little on the lower side of the bar, it will help it to tone down and be less hard on the eyes. Colors that are too bright may look alright, but often a little less saturated colors turn out better.

Hue Shifting - Again with the color wheel, we use it for hue shifts. Now, I want you to remember that term. "Hue-Shifts" are a very, very important thing to make good colors. We'll use red (An easily hue-shifted color) as an example. When making a hue-shift you always shade using the color that appears darker on the wheel, so look back to the color wheel at red. We would use purple to darken the red until we like the color for shading. A hue shift is where you take one color, say red for instance, and you add another color. Sometimes you can use a weird color for shading. Though white is usually shaded with blue, sometimes the lighting you want on a skin permits any hue shift you want. If there's a color you want shifted weirdly and you can't manage it through moving the color wheel, there's a little bar that controls transparency. Turn it down to maybe 80 and color normally on the color you want changed.

Simplistic Shading - I use what's considered "Simplistic shading." There are those you may know with very different styles, and I'll get to those in a moment. For now, I'll teach you my shading style.

Take a good look at this skin. It's got shading on the inner arm, chest, hat, shoes, and legs. Here's the layout in "Hybrid" skin viewing mode. You can see where I mainly shade. The small accent lines in the middle of the chest and back help break up the otherwise plain areas. My shading is very linear, meaning it's made up of straight lines. Most of the accents- see a few sentences ago- are a line of a darker color with two lighter ones on the sides. It seems kind of weird but I think it looks okay. A lot of simplistic skinners use a lot of highlights, which is where you take a lighter version of the color and use it to add a shine so certain areas. I avoid it, simply because cloth shirts and clothing wouldn’t produce such a sheen, but I do recommend it when it’s meant to be plastic, metal, sometimes hair, or any other shiny surface.

That pretty much sums up shading. It usually takes me 15-20 minutes to finish a skin like you see above, but if you’re just starting don’t worry if it takes you an hour or more to complete a skin.

Eyes
There are more eyes under "Hat/jacket layer," but for now I'll show you four basic eyes. Not all skins require eyes, and if you want to go very simplistic sometimes it can look cool. Of course, other times you simply can't figure out an eye for any given situation, which you can also go eyeless for those. But for now, here they are.To make it neat and compact, the top of each picture is the head, the middle the required hat layer, and the bottom the finished eye. The first is a simplistic eye, one I use often. The second, a large-eye browed version usually used by a skinner called "500poundsofnothing," but you can use it as you see fit. The third is a steve-eye, the most common and classic eye. I personally don't use it much, but I included it. The fourth is what is usually called a "Teen-skin eye," because so-called "Teen skins" usually use them.
When making an eye, some special tips are:
If you have an eye color that needs to be incorporated or you feel like trying a colored eye, simply make the pupil (little back dot) to the desired eye color. It often works fairly well, and I used it in my FNaF skin collections.

Hat/Jacket layer

There’s a layer that we skinners call the “Hat” or “Jacket” layer of a skin. I’ll be telling you a few tricks of the trade for using hat layer.

Anime eyes

I’ll start with a pretty basic trick for getting “Anime eyes”. Anime is a Japanese cartoon version of the comics of the same style (Manga). It has, in recent years, become very popular in the US and it offers many characters to skin. These eyes are anime-ish, but they can really be used for anything. That last step is unnecessary to these eyes, but creates a cartoony eye that could be useful.




Horror eyes

To do horror/tiny pupiled eyes it’s a little tricky at first. Pay close attention here. There’s a dotted line on the left side so you can count pixels. It isn’t always seen at all angles, but most angles the eye effect is pretty neat (Albeit slightly unsettling.) The last step isn’t necessary, and it only smooths out the shape of the eye. I’d only recommend it if there’s room.


Ties (Bow and classic)
If you're making some kind of suit, or really anything that needs a tie, then look no further. The top is a bow tie and the bottom is a classic tie. The bow tie design can be used for hair bows, too.




Collared shirt

To make a collared shirt, start with a T-shirt. To make the collar really visible, it has to be a different color, and red and yellow complement each other so I’m using them.



Rolled sleeves

I’m sure you’ve seen rolled up sleeves, whether it’s a button-up shirt or just any old long sleeve. It can look nice in an outfit, and I’ll add it here so you can use it in your skins. Once again, that last step is optional, and just tweaks the look of it.



Hats

To make a hat, it’s very simple. If you’re doing a baseball hat (Below) you’ll use the head hat layer to make the front brim, making sure the hat brim goes a little on the side of the head, too. For a bowler/fedora/top hat you’d take the brim all the way around.



Hair

Ah yes, the one you’ve been waiting for. Sort of an extension of the hat layer section, hair can be done many, many ways. I typically only skin males (Sorry gals, there’s already plenty of girl skins out there) so the hairs I show you will all be traditionally male hair styles. For more hair styles, simply browse my skins or look up a catalog of hair styles for inspiration. Hair is the one thing I do sometimes highlight, and my shading for it is usually rather linear, with lines that create the way the hair is parted. Here are a few of my recent ones.
(Working on getting the picture to work)


Thank you all for popreel within 3 hours!



If this tutorial helped you, please diamond!

Side note: I only made this upon popular request, I'd never be so arrogant as to think myself great enough to teach others.