in the third lesson of our QuickStart
tutorial for v-ray for Sketchup we will
cover lighting interiors in two parts
using v-ray next this will build on
concepts from our previous video which
explored exterior lighting so we would
recommend watching that one first if you
haven't already okay
I've opened up a file on SketchUp Pro
2019 called zero three interior lighting
start which you can download from the
link in the description of this video
first let's open up the asset editor and
check our settings I'm gonna render
using my GPU make sure interactive
rendering is enabled and used to noising
with the Nvidia a ide annoys ER for a
very fast preview now let's go ahead and
start an interactive render as our
preview loads here you'll notice that
there is a light gray material override
on every object in the render excluding
the windows so that light can come in
from the outside this is due to the
material override toggle being switched
on here in the settings let's take a
quick look at how we've excluded the
windows from the override if we switch
to the materials tab and search for
glass we will find the glass material if
we select it you'll see at the bottom of
the material settings on the right that
there is a checkbox called can be
overridden by default this setting is
checked on but I've unchecked it for the
glass in advance so that the glass is
not affected by the material override
option in the render settings okay let's
see what else is going on in the project
here let's clear the search and head
over to the lights tab currently the
light is coming from a sunlight and a
sky texture in the environment settings
background slot let's adjust them so
that more light comes in from the
windows on the right we can do this by
tweaking the time and date in the
shadows panel
next let's head back to the settings
where we can tweak the exposure value so
that we have a better exposed image as
mentioned in lesson 1 of this QuickStart
series
higher exposure values will give you a
darker image while lower values give you
a brighter one just like the exposure
value in real world cameras let's
increase the exposure value to nine just
to tone down the brightness a bit
all right now let's stop the interactive
render and then from the v-ray lights
toolbar select the dome light you can
then place it anywhere in the project
inside or outside since it makes no
difference
next back in the asset editor
right-click on the environment
background texture and select cut also
before we continue note that if we leave
the background texture check box enabled
it will still cast light into our image
this will be overridden only if the dome
light is used instead and its shape is
set to sphere now head to the lights tab
select the dome light and in the
right-hand flyout paste the environment
texture into the texture slot of the
dome light as an instance now VA will
render the environment sky texture via
the dome light rather than just via the
environment background giving us some
additional flexibility and speed in this
case I will also leave the dome light
shape on Hemisphere as well as I found
it doesn't really make a difference
either way for this project to fully
take advantage of the benefits we should
make sure to have checked on the
adaptive checkbox for the dome light
below this way we'll make the most of
very next spousal scene intelligence
which uses adaptive sampling algorithms
to get you significantly faster and more
accurate render results this is
particularly effective for interiors
where the render speed can be increased
substantially depending on the scenario
alright now let's start the interactive
render again
I think that's looking better already
let's now talk all off the material
override so we can get a preview of our
image with all the materials supplied in
the project
that looks pretty good so far but I'd
like to lower the contrast between the
light coming in from the Sun and the
illumination coming from the sky the
adaptive dome light we created makes
this kind of control very easy all we
need to do is increase the intensity of
the dome light to a value that achieves
some more balanced look let's try a
value of two
as you can see this immediately over
exposes the image though so let's
compensate for that by increasing the
exposure value a bit to ten note that
these tweaks to the lighting are more of
an artistic choice to get the look I'm
going for rather than attempting to
follow a realistic or typical workflow
now let's head back to the lights tab
and as a finishing touch I would also
like to make the shadows a bit smoother
as well from the Sun settings let's
increase the Sun size multiplier to five
which will soft in the shadows some and
make the light feel a bit less harsh all
right now that I've achieved the look
that I was going for let's go ahead and
prepare to do a production render so we
can see how the final image will look
first I'm gonna stop the interactive
render then in the render settings let's
toggle off the interactive mode and make
sure that the progressive mode is also
toggled off so that we render with
buckets which are optimal for getting
high-quality renders faster let's also
switch the denoiser engine from the
Nvidia AI denoiser to the v-ray denoiser
which is more suited for production
rendering as it delivers more accurate
results and although we have set the
exposure manually already I'd like to
make sure we have a perfectly calibrated
exposure and white balance v-ray next
makes this easy with the option to turn
on automatic exposure and automatic
white balance simply by pressing the
auto options for each here for this
project I already enabled the auto
options for production rendering in
advance so they switched on when I
disabled the interactive render toggle
now fury will handle the tedious setup
of exposure and white balance so that
our image is correctly exposed with
neutral colors appearing as we would
expect them all with just the click of a
button
finally let's drop down the render
output and set the image width and
height to 1280 by 1600 I'll also leave
my quality setting on high but you can
feel free to use whatever feels
comfortable for your system as this
render will take some time okay once
everything is ready we can go ahead and
press render
note that if you want you can use either
your own render or the one provided with
this lesson to use ours simply open up
the VfB and in the VfB toolbar click on
the open image folder icon and load in
the provided day render via our image
file then you can use that to follow
along with the next steps
after the render is finished you'll see
that we have a nice image of the
interior space now let's explore some
color Corrections and post process
effects that we can do to finalize our
image right inside the VfB in the lower
left corner we can click the color
Corrections controls and then enable the
exposure parameters let's drop down the
controls and then let's enable the
forced color clamping toggle down below
to display the over bright areas in the
v-ray VfB and get a better idea of where
our image has been overexposed now we
can lower the highlight burn slider so
that we can remove any burned-out colors
keep in mind that setting a value that
is too low can flatten your image so you
want to be careful not to go overboard
with this rather the goal is to find the
right balance now that we have
identified the overexposed areas let's
toggle back off the force color clamping
mode and then bring back up the
highlight burn to 0.9 which I think
looks pretty good to me next let's
enable the white balance so we can tweak
the color temperature and find something
that looks nice for the image I would
like to bring back a little warmth into
the image and make our interior feel a
little more cozy so I'm going to
increase the color temperature a bit to
something around 7,000 we can also play
with the hue and saturation of the image
as well as the color balance these
settings already have some tweaks that I
made in advance that I think will work
well here I've just lured the saturation
a bit for a more photo like result and
use the color balance options for more
sophisticated control over the overall
appearance of the image the color
balance lets you adjust the shadows
mid-tones and highlights individually so
feel free to have a go with these
controls and find a good color balance
to your taste or you can also copy my
settings we can also tweak the curves of
the image the curve control is a good
way to adjust the contrast of your image
for example tweaking the shape of the
curve like so a simple S shape in the
curve editor can make your image pop a
bit but again you should feel free to
experiment and find a look that works
for you we can then save our color
Corrections if we click on the Global's
option at the top and choose save then
we can set a path location give it a
name and save it
finally let's enable the lens effects
settings so that we can introduce some
bloom and glare into our render with
these settings the effects are a bit
weak so let's bring in some more by
increasing the intensity value to one
all right at this point I'm gonna save
my render so we can finish up with our
daytime interior image and then we can
move on to part two of this tutorial or
we'll cover how to set up a nighttime
lighting scenario make sure to save your
final render and the project as well
since going forward we're going to make
some significant changes to the project
to achieve the impression of nighttime
lighting
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