hi and welcome to the introduction to
interior lighting quick start video for
v-ray for Revit in this video we'll go
over lighting techniques for interior
spaces okay let's get started launch
your version of Revit here we have 2017
loading open up the project file
interior lighting dot RVT which you can
download from this videos tutorial page
online if you are using a version of
Revit newer than 2015 Revit will
automatically update the model in a few
seconds for you this scene is a basic
interior with some basic furniture
windows and some interior lights we'll
start with the environment light first
start an arty render using the sunlight
that is already set up in the scene in
Revit go to the v-ray tab and set the
current view to the render view keep
quality a draft and leave the resolution
at 800 by 600 or adjust it as you prefer
if you have a slower machine
now leave artificial lights off and the
Sun is already enabled and ready to go
click here to select render with v-ray
RT you'll notice some of these lights
appear to be on despite our turning off
the artificial lights now these are
actually self-illuminating materials and
not exactly lights per se these
materials are made to look like light
sources and we'll cover them later but
sometimes Revit families are already set
up with these self-illuminating or
emissive materials already click stop in
the progress window to halt the render
click on the lamp and then click on edit
type to replace the lamps material
select the material lamp glass disabled
this is included with the downloaded
project for you then click OK and now
let's restart the arty render and you'll
see those materials are not
self-illuminating anymore I'll move this
to the side of my desk
top to make some room we see in the RT
render that the Sun is not lighting the
room very well yet while RT is still
running I can select the render view and
go to the render settings click on the
Sun settings and here you can adjust the
Sun to suit your needs change the date
to June and click apply and RT shows how
the Sun is creeping onto the porch a
little bit now now change the time to
6:30 p.m. and you'll see the Sun is
coming into the space and gives it a
nice sunset look to the room change the
solar study from still to lighting for
different types of controls on the Sun
and click apply the new settings are
based on azimuth and altitude to define
the position and angle to the horizon of
the Sun you can change these settings to
see how the Sun position changes the
lighting now change azimuth to 292 to
get that sunlight right into the space
play around with the angle a little bit
to see how that affects the room setting
the angle to a lower number like 15
gives you a nice sunset or sunrise look
changing not just the angle but also the
color of the light click on OK in both
dialog windows click on the VA Sun
button to access the settings change the
Sun size from the default of 2 which is
generally the most accurate setting to 6
and our shadows get much softer the
higher you go the softer the shadows
will get which may not be physically
accurate but might be a nice effect
close the Sun settings now let's try
switching from the Sun to a dome light
RT updates to show the dome light as a
solid color kind of making this look
like a cloudy scene outside let's enable
use HDR image there is an HDR image that
is included by default but you can use
any HDR file that you would like now we
use the default one and play with the
rotation settings to change the position
of the Sun in our dome to change the
lighting in the room let's set the Sun
to twenty two degrees to get the light
back in the room stop the Aarti render
for now turn on artificial lights and
close the dome light settings click no
light here to disable the dome light for
the time being so we can focus on the
artificial lights in the room first
we'll add the self-illuminated materials
back to the lampshades select the lamp
click Edit type and on shade click here
to select lamp glass as we had before
this is an emissive material giving us
light in the scene from the lamp shade
click ok let's go back to the v-ray tab
and click render with v-ray RT to
restart the artena render the lampshades
are illuminating the scene but it's
rather dim so let's adjust the exposure
of our camera click on the camera
settings icon here and adjust the
exposure slider to bright interior with
a value of about eight and the scene
brightens up quite nicely close the
camera settings let's see a production
render now stop the RT render click the
render v-ray artis pull down arrow and
select render with v-ray after a little
while click stop when you're happy with
the draft quality we can see that these
wall fixtures don't appear to be on or
doing much lighting v-ray for Revit
looks at the settings in the Revit
families to get their parameters when it
lights the scene so maybe these lights
in the scene aren't bright enough click
on that family and then click Edit type
scroll down and you can see the initial
intensity is only 10 lumens which is not
at all bright click it and change it to
180 lumens and click OK
now instead of re-rendering the whole
scene let's just render this region by
clicking the region render button here
and clicking and dragging a marquee
window around this light go back to the
v-ray tab and click render and it will
update just that region and there's our
light now let's look at emissive
materials these self-illuminated
materials on the lampshade and on these
can lights to makes them look as if
they're turned on so let's work on the
light here as you can see it's a
different color than the rest of the
light in the room with emissive
materials by default they don't allow
other lights to go through that surface
the warm light we have inside this lamp
is only coming out of the top and the
bottom of the openings in the lampshade
model as you can see on the wall the
cooler colored light here on the wall is
coming directly from that emissive
material itself and not the light inside
the lamp using a v-ray material however
we can allow that light to pass through
the material if you need go to the
material browser and type in the word
lamp to find it in the browser you'll
see lamp glass as one of the materials
click the drop-down auto Jen and replace
that with v-ray material that opens a
file browser navigate to the emitter
material dot VR m80 material that comes
with the tutorial select it and click
open to assign the material to the
lampshade select a region around the
lamp in the v-ray frame buffer or VfB
and click render it only changes
slightly it's still only using the self
illumination from the material here on
the wall to let the light pass through
the lampshade click in the material
browser to expand the materials settings
click on the Edit v-ray material button
select the Advanced tab and click on the
options section disable cast shadows to
enable the light inside the lamp to go
through the shade click on file menu and
save the changes to the material and
close the
now rerender that region and you'll see
that the light inside is coming through
and lighting the wall alongside the self
illumination from the shades emissive
material itself while this looks good
the light is not physically accurate
because of that emissive material on the
lampshade but that's easy to address by
changing the lampshades material to be
more like a real frosted glass as
opposed to an emissive self-illuminated
material in the material browser click
on the lamp glass material drop down to
set it back to auto gen and close the
browser select the lamp object and click
on edit type here in the type properties
window click on the shades lamp glass
material for the material browser window
click on the appearance tab and turn off
the self illumination checkbox and click
OK click OK in the type properties
window in the v-ray tab click on render
to see the change which creates a more
predictable accurate result for the
light in the lamp with a frosted glass
shade now let's get the artificial
lights to work alongside the
environmental light turn off the render
region in the VfB start an RT render
again select the dome light to turn it
back on
RT updates and shows us this is way too
bright one way to do this which is not
physically accurate but still effective
is to reduce the intensity of the dome
light set it to 0.1 and the environment
light is much less bright overall making
the intensity down even further gives us
a nighttime render with a little bit of
environment light coming in from outside
now stop the RT render change the
quality to high and set the resolution
to 1152 by 864 for a bigger nicer
quality render
click to render with v-ray to start the
final rendering now the longer you allow
it to render the cleaner the result
becomes now will elapse a little time
here as the render resolves to a nicer
quality and there you go thank you for
joining us for this introduction to
lighting with v-ray for Revit quick
start video
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