Cinema 4D Tutorial - Using Cel Shader to Cast Shadows on 100% Luminant Objects Video Lecture | Create stunning 3D Graphics with Cinema 4D - 3D & Animation

everyone a DJ from my design calm and
today I'm gonna go over a little
question that I had a lot of people
asked me when I'm covering all the 2d
illustrative style inside a cinema 4d
and that is how people can get a shadow
cast onto an object that has a hundred
percent luminance and I go over this a
little bit in my actually go over a lot
of it in my cell shader tutorial which
you can see right up on the screen now
it's on my webpage just check it out
you go I design comm forward slash
tutorials and if you go down a little
bit you'll see this tutorial with a
little anchor and I go over basically
all of the options in the cell shader
all of the basic options but I'll go a
little bit in depth with just the shadow
part of it and how I apply shadows to
illuminate objects so let's go and jump
into a cinema 4d alright so this is
gonna be really really quick here so I
have the scene set up I'm going to turn
on interactive render region here real
quick so you can see what I got just
some line art style of a Polaroid here
Polaroid camera and what we're gonna do
is I have a plane here that is just my
ground plane here and if I go to my side
view you can see that my plane is right
below my object here so this is this is
gonna have a completely luminance
material on top of it so a lot of people
ask how can you cast shadows onto
something that is completely luminance
so if we go ahead and add a I like to
use an infinite like it's just a very
straight it acts like a sunlight
basically and I'm just going to position
this up here and basically you're just
kind of pointing this infinite light
like the Sun where it's gonna be
pointing at I'm just gonna give it a
slight angle here and then I'm gonna
turn on hard shadows because we're
dealing with hard edges and that makes
sense to have a hard edge shadow as well
and you'll see that of course there's no
shadows being cast because everything is
an alumina as illuminant
Tyrael 100% luminance Oh nothing's gonna
get cast on that cuz it's almost like
casting a light on or a shadow on a
light you're not gonna it's not gonna
happen so what we want to do is when you
have an illuminated object and we want
to cast a shadow of this polaroid camera
onto this plane here we need to go in go
in adjust and apply a cel shader on to
us you can find under sketching toon
cell and then what that's gonna do is
gonna apply a crazy blue texture on here
by default and what we can do is just
get rid of these blue textures and bring
back that kind of tan texture or what
you can do is adjust these so what what
this is just your diffuse and what you
want to do is adjust this to have two
shades because you want a shade of just
your normal color that'll be pure white
and then whatever shade you want your
shadow to be and right now we have
camera set on which means that a camera
is gonna act as the lumination source
and we want to turn that off what we
want to do is use this light so we can
use the light to cast shadows by just
checking on this lights option and then
it's gonna make everything all bright
and then what we need to do is actually
enable shadows because we want shadows
applied as well and automatically you'll
see that that will enable this shadow
option up here and for right now that we
don't need a tritone kind of color for
our shadow we just either need it light
with no shadow 100% white which will be
no shadow or dark where it's a hundred
percent shadow since we're dealing with
a flat scene here we just need this kind
of like tinted two-tone kind of
treatment so anything so everything
without shadow will be white everything
with shadow will be dark and this is
kind of like this threshold but since
we're dealing with a flat surface you
really can't tell the difference so you
can see that we have a shadow cast and
I'm just gonna move this down here and I
can go to my light and by adjusting the
angle of this infinite light will affect
our shadow here so if I have it at a
very sharp angle that will actually
who's our shadow all together and
that'll bring it back or if we have our
light source kind of just going angled
straight down you can see we get a
shorter shadow and actually like that I
like just a short shadow just underneath
it and you can see that the color of the
shadow matches the darker color of our
diffuse and again this is kind of like
the threshold of where these colors are
applied on your geometry and again we're
dealing with a flat surface so it really
doesn't matter all you need to know is
that whatever's this darker color will
be the color of the shadow so if I want
say a crazy orange color of my shadow
I'll just change that diffuse color and
there we go and if I want the lighter
part of our shadow or if the lighter
part of our scene that's not having any
shadow cast on it to be this crazy green
I can do that as well so basically this
just to diffuse the color of your object
in the darker color or the color to the
left here will be your shadow so I will
undo that that's a little too nuts I
just want this just nice kind of gray
maybe we could make this a little bit
cream-colored shadow here just something
subtle that looks pretty good maybe a
little darker there we go so diffuse
controls the color of your shadow
enabling shadow enable shadow and you
can play with all these other values
here as well so this value if you go to
mode value the thing that's controlling
the color of the shadow is actually this
color right here and that is just the
grayscale value so using a color doesn't
really work so it's just a grayscale
value of your shadow so I just like to
stick with normal for this because then
you can actually choose the color so
that is basically it so again we have a
light set to hard shadows and I like to
use infinite lights because it's a nice
kind of 2d shadow you can see if I
choose like a spot light or something
like that we get this circle which
doesn't work very well so
infinite light hard shadow and we apply
a cell shader material onto the surface
that we want to have a shadow cast onto
it and we make sure that we have shadow
enabled lights enabled in mode set to
normal and you can set your colors here
so hopefully that clears everything up
as far as being able to apply shadows or
cast shadows onto a hundred percent
luminous objects and there you go if you
have any questions let me know and as
always thank you for watching see you
next time