- [Zach] Welcome to the sixth video of the Blender 2.8
beginners tutorial series. In this video, we will UV Unwrap the apple and the knife for our 3D scene. As always, you can find the time stamps of this video in the
video description below, and if you want to follow along sign up to our resource
section free of charge where you can download
all the project files, our handy Blender 2.8 shortcut PDF and other helpful resources. The link you find down below
in the video description. Hi everyone, Zach here for cgboost.com, and let's get started. If you're not familiar with the term UV Unwrapping or UV Mapping, this process helps us to put
a 2D image onto a 3D mesh. In this process, the
mesh will be unwrapped onto a flat 2D plane. Imagine a cardboard box,
which you cut on the edges and then lay it flat on the ground. Now, it's very easy to paint on that, then you can put it back together, and then you have a nice,
3D painted cardboard box. In Blender you won't
actually unwrap the 3D model. So, you won't see your
model unwrapped in the 3D viewport, however you will define seams where the mesh should be cutted and then you run the UV Unwrapping
process which happens behind the scenes, and
then in the UV Editor you will see the final unwrapped model, which is also called UV Map. UV stands for the X,Y
coordinates of a 2D plane. Then you can place a 2D
pixel based image underneath the UV Map, then paint above the UV Map, and then you will see this
nice texture on your 3D model. Okay, now let's have a look how this UV Unwrapping
process works in detail. All right, before we start
the UV Unwrapping process, please again make sure
that all of your object has a scale value of 1,1,1. So, select all the objects
and if one of those object don't have this, press Ctrl
A, and apply the scale. I mentioned this 100 times
already, but it's so important and also for UV Unwrapping,
if the scale value is nonuniform, this will cause trouble. So, do yourself a favor and do that. You can also simply select
everything and press Ctrl A, and click on apply scale. Now, let's go over to
the UV Editing workspace. Depending on what you have selected, you will automatically
switch over to edit mode. But let's quickly go back to object mode because first of all, I
wanna show you one thing. If I select a cloth, tap into edit mode, and select everything,
you can see over here in the UV Editor, that this
object already has a UV Map. And that's because if I
tap back to object mode, add for example, a cube,
all the default objects, if I open this down here, have a automatic generated UV already, when this is enabled. So, if I tap into edit mode of the cube, you can see we have a perfect
UV Map over here already. So, and the same thing
applies to the cloth here, this was a simple plane, as I edit this, and also a simple plane
has a UV map already, as you can see. So, we don't need to
create a UV Map for this. So, that means we can simply hide this, then for the bowl, we
also don't need a UV Map, because for this, we will
only use procedural textures, which are computer generated. What this means you will learn
in one of the next videos. So, let's hide this as well, and for the wooden planks over here, we will use a automated way to place textures onto the model. And what this means, you
will also learn later on, so let's hide this as well. The only two objects we
need to manually unwrap, are the apple and the knife. So, let's select the apple,
press Alt G to recenter this, and let's also move this
knife a bit closer here. So, when I select the
apple, tap into edit mode and select everything, you can
see that this has some kind of UV Map already because
we started with a UV sphere, and this has an automated
generated UV Map already, as I showed you with the cube. But, we can simply ignore this, because we wanna generate in U, UV Map. So, first of all, if I
deselect everything here, by simply left clicking
somewhere and just select a few vertices, you can
see over here we only see the vertices which we have selected. When you're starting out with UV Mapping, this can be quite confusing. So, what I do recommend, at least for now, is to enable this little button here, which basically synchronizes the 2D view, the UV Editor and the 3D view,
in terms of what we select. So, if I select something over here, this will be selected here as well, and the other way around, as you can see. And in this way, you always
see the full UV Map also when you don't have
everything selected over here. So, in order to create a
UV Map, what we need to do, let's go to edge selection. We need to select edges
and define them as seams. So, the UV Editor knows how to
unfold, or unwrap the model. So, for the apple I already tried this. What I do, I hold on Alt
and left click, to select a loop over here, then with
Shift, Alt and left click, I select this loop, then
this one here, and this one. So, I hold down Alt and Shift, then I can select multiple loops. And in order to mark this edges as seam, I simply right click
and click on mark seam. If you, for example, accidentally
mark some edges as seam, you can simply select
these, right click and click on clear seam, to remove the seams. Then, let's press L with
the mouse above the apple, and press H, to hide this, so we have a better
view onto the stem here. Now, let's Alt, left click,
select this loop over here, and with Alt, Shift, this loop,
then right click mark seam, and now press Alt H, to unhide the apple. Now, we need to start the
unwrapping process for that, important, we need to
select everything with A, in edit mode, and then we
go to UV and simply click on Unwrap, you can see
immediately this was unwrapped, depending on where we set the seams. What we can do down here,
is to change the margin between those islands,
so each of those areas, are called islands, UV islands. So can change the distance, and over here, if I disable this again, we
have some options to select, and for example, this over
here, allows us to simply with left click, select whole islands. And same as in edit
mode, or in object mode, in the 3D viewport, we can
use G, for moving around, when something weird like this happens, then we have proportional
editing still enabled, so, let's disable this,
now if I move this around, you can see I can change the position, or, the rotation, with R,
and with S, even the scaling. But, I don't recommend to
simply scale single islands, and place them somewhere here, because the size of the islands
are now matching each other, that means, the size of
this face, for example, represents the size of the
face here on the apple, and this has the right size also depending on all the other islands. So, if you wanna scale this,
you have to select everything, and scale everything,
so that you don't have a higher resolution on one area and a lower resolution on another area. So, now what I try to do
is to place these islands in the best way possible, so that they use the most possible space
of this square, here. So, I press R, for
rotating this, scale this, and then with the island
selection enabled, I select the single islands
and move them around. With left click you can place these, and make sure that none of the
islands overlap each other, because when I paint this area here, then the same color will be
applied to this area over here. So, it's important that everything is not overlapping each other. So, I think we can scale this even more. Also, take care that we
don't go over the edge here, so, move this closer over here. So, this looks quite good I think. Let's tap out of edit mode. If you like you can simply hide the apple. And maybe let's simply press Alt G, with the handle selected,
and recenter this. So, now we have a little problem
because the knife consists out of two objects, the
blade and the handle. But here in Blender, we can
simply select two objects, and with Tab, enter edit mode of both objects at the same time. Again, if I select everything you can see we have some weird UV Maps here, and that's because we started with cubes, and they had the default UV Maps already. So, we can ignore this again. And for the unwrapping process, let's enable the sync function again. First of all, let's click
somewhere here with L, I select the blade and press H, to hide it so I have a better view
here on the handle. Now, edge selection is still enabled. Now, let's Alt, left
click, to select this loop. Then with Shift, Alt, this one here, and also the two on the other side, and also these over here. And to make the UV Unwrapping
process as simple as possible, I basically just cut off each side. So, all these are selected,
right click mark seam, then let's press Alt H, to show the blade, now let's deselect this and
with my mouse above the handle, press L, to select this,
and H, to hide this. Now we can focus on the blade. First of all, let's
select this one over here, then with Ctrl, left click
this one and then you can see the shortest way in-between
will be also selected, and if I hold down Ctrl again,
I can do it again over here. Then let's right click
and mark this as seam, let's do the same thing on the other side, with Ctrl, I select the
whole line here, right click, mark seam, then I select
this here, mark seam, and also these two over
here, right click mark seam. Now, press Alt H, to unhide everything, select everything that's
important, click on UV and Unwrap. What you can also do, is simply press U, and then you have the same menu over here, you can simply click on Unwrap. Now, the margin down here is a bit big, let's decrease this, and as you can see, this already places the
islands pretty well, we have a lot of empty space over here, but since these are very long islands, I think it would take a
while until we figure out a better way to place everything. So, I think in this case,
we just leave it as it is. Let's tap back to object mode. Go back to a layout, now
we can simply save this. Yay guys, now you have a rough idea on how to use UV Unwrapping in Blender, I hope this video makes the process clear, certainly the more
complex your object gets, the longer the process and
editing the UV Map takes. Anyway, if you enjoyed this
video make sure to like, subscribe, and leave a comment
in a comment section below, and make sure to ring the
bell underneath this video, if you wanna get notified
for future videos. If you wanna learn
Blender 2.8 even deeper, and wanna make sure that you don't miss on important fundamentals,
make sure to check out my Blender 2.8 launchpad
course, which I created with speak attention to
detail, so that you have a full and deep understanding of the
fundamentals of Blender 2.8, while creating a full
animated scene from scratch. If you wanna learn more, check the link in the video description. Thanks a lot for watching, guys. Now, check the next
video, where we will use the texture paint mode,
to project paint images onto our models, to have
realistic looking texture details on the objects, which we will
use later on in our materials. I will see you there, goodbye. (exploding) (dinging)
