3D Compositing in Fusion Part 7 Video Lecture | Eyeon Fusion: A Practical Hands On Course - Professional Skills

okay so let's talk about volume fog here
I'm going to delete this volume mass
that we created don't need that anymore
so this volume fog it's an interesting
tool very powerful also let me create
one here
volume fog - if you thought that volume
mask was great in terms of 3d
capabilities volume fog is even a step
further in that so let's do this let's
first set this up so I have the volume
fog here and it already shows up you
know with your fog I'm going to just do
fog only now the 3d capability or
enhancement of 3d capability here is
that you can actually feed in a camera
so I'm going to use this camera and feed
into this volume fog as the 3d camera
now it's going to give you that region
again for the default this time I'm
going to now take this original shot and
merge that with the volume fog right so
I'll take this and
do I create a merge you look at that
merge here
and the volume pockets right here anyway
so let's see I think I we need to
reverse the order yeah this is this is
supposed to be for ground so let's do
control W and now you can see the volume
fog appearing here at the center right
now let's play with it a little bit I'm
going to increase the size first of all
show the cube of this volume fog way to
unlock the size X Y and the Z
coordinates and I'm also going to open
up the rotations okay so now as you move
this fog into X Y and the Z position you
can see it happening in the in the merge
node here in the scene let's just leave
it here for now and increase the scale
in Y which is the Y as you see I'm going
to go to the color and reduce the gain a
little bit so that we can see what's
happening
and from the additive I'll create a
little less sedative more towards
subtractive okay back to the coordinates
here and let's rotate this into the X so
now you can see that it's actually
coming in from the from the back now the
interesting thing is that it's
respecting the geometry again you see
the edge here this is the door right
this is the door here as the volume fog
is going on the other side of the door
it's actually
giving you that effect that it's behind
the door let's scale this in the x-axis
a little
and
further into the y-axis because I
actually want it to go up and also hit
the ground so let's do 22 the y-axis and
we are going to come down in Y
and more into the Z
to bring the the fog inside the house
all right so you see that the lights
coming in you can change the color of
this fog from the default white do
something that's more morning fog type
environment little bluish you know more
dramatic and you will see that happening
here inside the viewport this is driven
by the OpenCL function of your graphics
cards if you if you don't have OpenCL 10
abilities this could be very slow
so that's your volume fog now you can
see here that it's blocked again you
know by blue as the is the geometry so
you can do basically the same thing
again you can bring in the footage with
blue so so let's go through this one
more time so that we can drive this
point home so here is blue and I'm going
to actually merge blue with with this
footage here
I'm going to create a merge node and
fade blue into that merge node don't
care with a foreground or the background
at this point you know if we go in the
background because the first one we'll
have to swap that this goes into the
foreground so you don't see blue here is
a hit suspected ctrl W and you see blue
now you can have the exact same thing
happening you know with with the volume
fog now
you
so yes that's the one this is the one
that we want we don't want this one so
I'm going to delete that alright so here
again this is probably reverse okay now
you can see that as blue is in this you
know volume fog actually is through blue
so you can see that the rays that are
coming from the top you know they are
ahead of blue but then you know there
are rays that are blocked by blue and
that's you know happening here also you
can see that this there are no rays
coming from the top so you only see news
hand and all the fog is behind him but
it's here you can still see some of the
fog ahead of you know blue very powerful
tool and it's all you know driven by the
whole position pass very very effective
now you can also have light into the
volume fog here
I haven't played around with light as
much but let's just do this instead of
bringing this in this camera into the
volume fog I'm going to take this into
the volume fog where I actually have a
light right so let's see what kind of
light do we have here let's look at the
perspective view and here's the light so
this light is actually pointing straight
at the camera so let's see if we can
move in the other thing we need to do
which I haven't done yet I think is go
to the light tab here and do like so now
you have this light that should
yeah now you can see that you know the
fog is actually respecting the light as
it's coming in
you
and that there is other possibility here
also if you want to let me just fit this
go back if you want to if you want to
create some noise here you can actually
create a fast noise and plug into the
volume fog any made fast noise and you
will see animation happening here also I
have not done that yet that's my next
move and as soon as I'm done with that
you know bring a tutorial on how to do
that or new at you but this is it for
now for volume fog in the next video
we'll walk through the rest of the
composition and bring it home
okay thanks