【面白動画　Make a 3D model from an AI image with FREE tools!】無料ツールでAI画像から3Dモデルを作る!

hi everybody i am back with another
video on creating a full 3d object from
an image generated via ai and that could
be by text or image prompt it doesn’t
matter um a lot of the views of my last
video wanted to see a version made using
more accessible tools
so thank you for the comments on that
and for checking out my channel i wasn’t
expecting the interest quite honestly
but this ai stuff is a hot topic right
now
so for this video instead of photoshop
3ds max nald and tool bag i’ll be using
photopia shader map 4 and of course
blender for the 3d part so
this video is for anyone who wants to
get a little more from their ai
generated images maybe you want to
export 3d model into vr or a game engine
or maybe you’d like to 3d print your
creation whatever it is so first of all
some caveats and i’m putting these here
because i’ll be chewed in the comments i
know i will
otherwise so first caveat is this won’t
work for every image that you create
the second caveat is i’m not a blender
expert i’m not even a blender user but i
hope to change that so i don’t have all
of the fastest key combos and keyboard
shortcuts and wizardry and whatnot
and number three is that there are
plenty of ways to go about doing this
and this method may not be the fastest
or the most streamlined but will
definitely get you where you need to go
and it is free
so we’re going to make um the same kind
of alien faberge egg as before
except this time we’re going to do it
using free tools so this is rendered
here this one here is in tool bag for
your rendering i will leave to you but
it should be possible to get somewhat
similar results using ev inside blender
okay
let’s go on over to
discord then and just check on some of
the prompts so i had been using
the prompt faberge egg xenomorph
biomechanical vertebrae aspect three is
to four and that aspect was just to try
and fit the entire egg into one kind of
portrait image and i also use the dash
dash test
prompt which is new to discord in the
last couple of weeks and it uh it’s an
alternative algorithm for generating
this stuff and it was worth the look and
i liked where it was going so i did a
couple of variations of this and you can
see there’s a kind of an organic
rib cage or an exoskeleton that has kind
of appear sort of grown over the the egg
inside and then there’s a couple of kind
of fleshy techy biomechanical bits
underneath so um good luck making
something with that in whatever ai
you’re using and i’m settling for
something that looks like this
there we go and i can show you that i
said we’re going to use free software
this is xn view i am going to nip on
over into photopia
there we go
and this is our image and this if you
haven’t seen photography before it’s
basically like a kind of a photoshop
clone that works in a browser it is free
to use and it’s ad supported so it’s
worth checking out if you’re ever in a
jam even you know the the photoshop
shortcuts work well um it’s a little
slower than local photoshop but that
shouldn’t bother us today so let’s take
a look at this image
it’s pretty nice i mean some of the
details as ever with ai generated
concepts like this kind of becomes a bit
nonsensical but i definitely think
there’s enough here that we can work
with and i’m going to make this in real
time
hopefully it won’t take more than you
know 15 minutes or so so we’ll we’ll see
how that goes
um so one thing i’d be cautious about so
this is going to end up being our kind
of diffuse
uh texture our albedo texture and you
know one thing you want to stay away
from is these extremely dark areas here
kind of want to fill those in a little
bit so what i’d suggest for something
like this is first of all i’m going to
create a new layer just so i’m working
non-destructively and i can always
revert to the one underneath i’m going
to go to
select i’m going to choose color range
and i’m going to just
kind of try and pick here
a range that will just grab those very
dark areas
something like that looks good
okay and you can see by the marching
ants there we’ve kind of selected all of
the really really dark areas and for
this i’m just going to try it see if it
flies i’m going to go to edis i’m going
to go to fill or the shortcut is shift
and f5 and if uh foreground or
background is selected here you want to
choose content aware and content aware
is going to
look at the pixels that surround the
areas that we have selected and it’s
trying going to it’s going to try and
intelligently kind of fill in detail in
our selected areas based on that this
might just create more gibberish but i
think you know at this stage kind of
anything is better than those dark
areas so let’s go and have a look at
that
ctrl and d to deselect
compare it to the one underneath you can
see it has lightened these areas in here
and even that is is better than just
having that kind of um that darkness in
there so yeah that’s pretty good go
something like that

and then beyond this this is the point
where i mean you can try and do some you
know what you might want to do is
depending on your image and how it looks
you might want to use some
shadows and highlights correction in
here and just to bring it up to more
kind of
albedo standards um in terms of hue and
nothing about this is physically
accurate you know we’re working from
concept images this is all about speed
um so let’s call that done i’m pretty
happy with that where that has left us
okay good stuff so now we can go file we
can go
export as i’m going to choose png
i’m not going to monkey about too much
with this stuff just hit save and that’s
going to go to my downloads folder
okay so i’ve gone ahead and copied that
to my folder i’m going to use for this
particular
um project the next part is shader map
pro and i’ll put the links to these
applications in the description but here
shader map pro is will do something
similar to nald and there are paid tiers
available so support them if you can if
you get some use for it there’s also a
free tier for kind of non-commercial
purposes which is going to suit us for
today just going to click on this folder
in the middle
and this is going to ask us to browse
to our project folder and i’m going to
choose the newly created albedo here now
these textures are not power of two
again this is not really
you know getting into too much detail
about bit depth and test texture
resolution this is about getting end to
end as quickly as possible
so here’s the shader map interface as
you can see we can kind of pan around
here and what we’ve got here is the
result of
the original input texture being
converted to a normal
kind of a pseudo specular height map and
ambient occlusion and it’s kind of done
that in the background when we just
loaded it so up here on the top right
what you should see is there is a
material editor and there are three
slots up here and they are similar but
not the same so the first one here on
the top left is standard the next one
over is displace and the one after that
is parallax we’re interested in this
place so let’s click the second one over
and drag and drop it onto our cylinder
and what you can see now is that we’re
starting to get that extrusion
on the silhouette that we we really want
to make our our 3d model okay that’s
pretty good one thing that concerns me
at this early stage is just the amount
of displacement coming off the top of
the egg that could lead to a little bit
of
a few issues with it down the line but
we should be able to correct those so
let’s just take a look at each of the
textures in depth here’s the normal map
that was created
and there’s one thing i would do i would
kind of i would tend to bring up the
high detail the high frequency detail a
little bit more
uh there’s some nice kind of ridges
on these on this rib cage that i would
like to preserve in the shading so it’s
going to keep all those in
all in all even for a tangent space
normal map this is pretty flat looking
so you know we we are going to be
relying on a combination of the normal
map and the height map to get something
that’s that’s a bit prettier
next up is specular we are probably not
going to use this very much that’s all
right um let’s take a look at the height
and the height kind of looks like it’s
being desaturated and blurred a little
bit but there should be enough there to
get us something decent so again i’m not
going to play about you can clamp the
the high uh the bright pixels or the
dark pixels you can play about the more
time you put into this the better it’s
going to look in the end but right now
i’m just kind of interested in getting
through the video
okay the one thing that was kind of
disappointed about shader map out of the
box was that i couldn’t really get a
very nice ambient occlusion map from it
so we can forego
the ambient occlusion map for this
project so here
uh you’ll see a little save icon and
says all beside us and if i hit all it’s
going to save and render each of the
textures to the original directory that
the albedo came from so if we have a
look in our texture folder now you can
see that we’ve got the normals and we’ve
got the height and we’ve got the
specular and we’ve got the ao so they’re
all in there and ready to go which is
super useful that’s going to keep take
us out of
shader map and we can move on into
blender
so i’m in blender 3.2.1
it’s the latest available as this is
being recorded and again i’m not a
blender expert but i’m going to show you
what i have found to be able to kind of
muddle through and ultimately come up
with that with something that looks like
this
let’s go ahead and reset this scene
okay as usual let’s go in here and
delete this blender cube but what i’m
going to do is i’m going to go
to the add
menu up here or you can choose shift and
a and that will do the same thing i’m
going to choose uv sphere and what
you’ll notice down in the bottom left
here

if you’re certainly if you’re a blender
beginner
is that we have this little menu that
has popped up and these are the creation
parameters for the the
sphere that we’ve just created so i’m
going to work really low poly and it’s
just it’s much much easier to work like
this and then detail towards the end so
instead of 32 segments i’m going to
choose 8
and instead of 16 rings underneath i am
going to choose 4
and hit
enter and that gives us a really low
poly sphere to work with and but that’s
absolutely perfect for our intents and
purposes so i’m going to do next is i’m
going to right click on the sphere and
i’m going to choose shade smooth and
without changing the geometry that’s
just going to give the shading the
appearance of a more kind of a rounder
sphere to take us back there
okay cool so what i want to do next is
i’m going to hit z or z depending on
where you’re from to go to the top
viewport i’m going to go into edit mode
on our object and i’m going to go into
face mode inside edit mode okay what i
want to do is kind of delete all the
faces that are north of this red line
here north of this axis so i’m going to
marquee select press x
and then faces
and those are the front facing faces
deleted so these the remaining ones here
are the back facing faces select that
again
hit x
and faces and now we have a hemisphere
to work with where we’re going to do
half the work and we’re happy here we’re
just going to mirror to the other side
and that’s going to save some time and
effort down the line okay great stuff
let’s go back into object mode
so the next thing is to bring in our
texture okay so i’m going to hit over
here to the material properties pad i’m
going to hit new
and you’ll see that a new material has
been created in this panel so what i’m
going to do next is i’m going to choose
the base color and that’s going to be
our albedo
so hit this yellow dot beside base color
and choose image texture and that’s
going to give you this dialogue here you
can create a new texture or you can open
one and we want to open an existing one
is what we want to do
so let’s grab our albedo
and that is now applied so why can’t we
see it well we have to change it the
viewport into shaded mode and we can do
that by hitting this option up here
and that is going to display our texture
on the model now we can see from looking
at this
that this is not really
working uh too well and that’s just
because we haven’t matched our uvs to
the texture that’s the next thing we’re
going to do
so with that in mind let’s go to the uv
editing tab and you’ll see that the the
screen splits in two and this is allow
you to see your your model and also your
uv layout so once again let’s change the
uh viewport shading mode to shade it and
we can see what’s going on here i’m
going to hit numpad 1 and that’s going
to take us to a nice orthographic front
viewport to work from
so in edit mode again if i press a it’s
going to grab all of the faces so in
some apps it’s shift in a in blender it
is a and that just selects all the faces
and you can see here on the layout over
here how we’ve inherited the original
primitives uv mapping and that’s not we
want what what we want in that in this
particular case so what i’d like to do
here is i would like to go to uv
i would like to go to unwrap
and just hit unwrap
and you can see that has made a single
island that kind of more closely
resembles what we’ve got going on in our
viewport so the next thing to do is to
go to the rotate tab here
and just rotate this into position so
that what we have in the viewport
matches what we have over here
and this is one of the benefits about
working at very low resolution until you
need it um for kind of vertex by vertex
work like this
it’s really useful
so let’s go ahead and just non-uniformly
scale this in
and then once i’m happy with that
placement what i can do is i can just
start moving these about
kind of vertex by vertex because this is
looking better than it was before but
it’s still not quite right
okay so i can marquee select here around
the vertex and i’m just going to move
these around into
something that is is nicer mapping here
and what i want to do is i want to keep
these inside the silhouette we don’t
really want to have any verts out there
and that’s just because you know it’s
darker and it could cause a bit of
unpred predictability when it comes to
displacement
so i’m just kind of going to grab groups
of these i want to make sure that the
top of the egg has a nice bit of detail
here
and because this is kind of organic as
well
um
you know there are going to be areas
that aren’t symmetrical and we kind of
want that
it’s a bit more realistic than having
something that’s perfectly symmetrical
so we’re going to keep as much of that
as we can i’m going to pull these words
down here in the uvs just to make sure
get some of this nice biomechanical
detail
kind of on the underside of the of the egg there

and you will see that the color space is
s or gb and i’m not sure what blender
should use for this i’m going to go with
linear even though it’s not a proper
displacement map you know it’s just been
generated from you know an 8-bit input
okay let’s go back here you can see that
it’s changed again and now let’s just
bring the strength down to maybe
something like
i don’t know 0.25
and see how that looks
that’s not too bad um we can change the
mid level then and see and i actually
prefer
the mid level is down lower because it
it keeps more of the egg shape there you
know and you can see at the top it’s
becoming it’s not as round as it might
be and that’s just because of the
displacement information that’s in there
but that there is easy enough to correct
as well and that’s something that we
could spend some time doing now because
these modifiers are in a stack i can
kind of change them independently so if
i increase the levels up here in the
subdivision modifier to six we get a
little bit more detail in there and if
you want to see exactly what’s happening
on the model it’s pretty easy just to
flip over to the sculpting tab and you
can see the kind of results that you’re
getting which is super useful it’s also
really cool to just add some more detail
and definition or remove some even in
this mode and if you want to do that
go back to shading here for a second i’m
going to
use the drop down on subdivision to
apply it and use the drop down on the
displacement to apply it as well and now
in here in the sculpting tab you should
be able to
sculpt directly on the model and this is
really where it’s worth
spending some time
um you can really really bring out
details and really enhance those kind of
rib cages and stuff so let me see let me
grab what will i use i’ll grab um
the crease brush
that’s quite nice i’m gonna undo that
gonna go over here to stroke
um
i’m gonna turn on stabilize stroke
because i’m working with a mouse um and
i’m going to turn on symmetry as well
and we can use symmetry on x and y and
whatever i do here
just to try and
you know just enhance these areas a
little bit just tighten up some of the
some of the curves that will be repeated
on this side and the other which is
super useful
as you’re
adding or subtracting from these areas
you know with the same brush you can
hold ctrl
and it will have the opposite effect so
if by default it kind of bulges out if
you hold control you can push in
and it’s really useful to
just enhance some of these areas because
some of them are quite flat because of
the displacement that we use so
sometimes it’s it’s really nice just to
push them in a little bit and it can be
quite easy
um to get
those giga-esque
curves and shapes in there
sometimes working out and maybe even
smoothing if you hold shift you can
smooth areas
um
and just kind of enhancing
what we have here already
okay
let’s call that done
so let’s go back to shading
and take a look and you can kind of see
a little bit we you know we could we
could use some work in here just to make
those a little bit more pronounced but
it’s looking pretty good
so next up let’s bring in our normal map
okay and this is the
uh the material that we’re using
so what i’m going to do here is i’m
going to go to add i’m going to go to
texture i’m going to go to
image texture
there we go once we have the image
texture node we can choose to open
and once again i’m going to choose my
normal map
and i know at normal maps
the color space for normal maps um
should be
um
non-color because it is information
about the surface it’s not necessarily
you know um correct hues and stuff we’re
thinking about so the next thing i want
to add is a vector
and it is a normal map vector okay so
let’s take the color from our texture
and plug it into the color of the normal
map
and then
take this normal output and plug it in
here
okay
so we can change the strength then
of the effect
of the normal by moving this spinner
back and forth
we don’t want it too heavy
just enough to bring some of that nice
detail in
okay
just have examined this from all angles
it’s still a little bit matte looking
so why don’t we go ahead and we can add
some roughness so i’m just going to use
a value for this
you can see bring the roughness down we
start to get
more of a sheen
on here starting to pick up the
environment a little bit more starting
to look a little bit more slimy and icky
and that can be controlled with textures
too
let’s just see what happens when i plug
in the color map into roughness
so because this is brighter
it’s more rough and these darker areas
in here are getting
more
of the environment reflected
uh what else do we have so if you want
to make it look a bit more organic i
think that a really good way of doing
that is um
to
use some subsurface scattering
especially
on these exposed ribs here and it’ll
just make the whole thing look like it
has been you know maybe formed as as
liquid or gel and grown

and
kind of evolved organically so here we
have the subsurface up here and i’m
going to choose a color for subsurface
that is kind of
i don’t know kind of brownish i guess or
or or kind of
um
yeah bonus is the color i want for it i
guess
um and let’s dial up the subsurface here
you can see you can go really high with
this and it looks like it’s made of
resin or jelly or something like like
that but we just want to give
enough subsurface that there’s a hint
of organics in here
and this will help as well if we go to
the lighting in the scene here and just
maybe really
amp this up
and we can see it starting to come
through
a little bit higher with this
maybe change the amount of of world
strength so we get a little bit more
contrast in here
i would like to add a ground plane
so our object has something to sit on
and we can improve the viewport here a
little as well over in the ev settings
here let’s turn on ambient occlusion
let’s turn on bloom
it’s a little high
let’s turn on screen space reflections
and you can see that the ground starts
to be reflected in our
in our egg here
let’s check the shadows if we see if we
can