hi and welcome to the introduction to
exterior lighting quick start video for
v-ray for Revit in this video we'll go
over lighting techniques for exteriors
following up on the previous video on
lighting interiors now I recommend
looking through at least that previous
video if you haven't already to get you
primed on general lighting workflow with
v-ray for Revit go ahead and launch your
version of Revit here we're using 2017
click open and navigate to the project
exterior lighting dot RVT which you can
download from this videos tutorial with
credit for this Revit model going to
Karami
baki this project was created with Revit
2016 and will upgrade automatically if
you open it with 2017 unfortunately
versions of Revit before 2016 may have
difficulty loading this project once the
project is loaded click the v-ray tab go
and click on the current and view and
select the render view leave quality to
draft and click on resolution and select
crop region select printer with a dpi of
150 and close the dialog change from the
v-ray Sun to the dome light which opens
the dome light settings and go to the
render with v-ray drop-down arrow here
and select render v-ray RT the render
starts and shows us a plain dome color
so click use HDR image for a more
dynamic lighting go ahead and experiment
with the rotation value to see how the
lighting updates positioning the HDR is
key to getting the kind of lighting
you're looking for from your environment
now let's switch back over to the Sun
and close out of the dome settings I'll
clean up my workspace a little bit here
in Revit you can select the render view
in the project browser and under the
camera section click Edit
to change the render settings you have
access to the Sun settings by clicking
here change the azimuth to 180 and click
apply and the arty render will update
and show a new lighting scheme set the
altitude to 54 and click apply to get
the Sun higher in the sky
now click still to change the Sun
controls to be purely location and time
and date based change the month to 6 for
June and the time to 10 a.m. and click
apply feel free to try different
settings to get a feel for how this
works but go ahead and come back to
these settings for date and time to
follow along the rest of this video
tutorial and click OK and that's pretty
much it for the exterior environment
lighting now let's get to work on adding
artificial lighting to the render click
stop in the VfB window to stop the arty
render and I'll go ahead and close all
these windows turn on artificial lights
and turn off the Sun environment light
now one trick to use when evaluating and
testing your artificial lighting is to
override the materials in the project
having a uniform material that is
applied on everything in the project
will give you the best chance to really
see how your lighting is working click
on the material browser click on the
global materials tab on the left here
and enable opaque material override and
also the transparent material override
this will override the materials with a
simple gray material that has basic
settings again to let you more easily
evaluate how the light is working in the
project close the window
start a new arty render now we will need
to adjust the camera so click on the
camera icon here and set your exposure
to about 5 to allow more light into the
camera just like with real cameras will
let the render clean up a bit here and
evaluate how that looks
as you can see right
now there are a lot of artificial lights
that are on go ahead and stop the RT
render now there's several different
ways to turn off lights but we're gonna
go ahead and use Revit built-in light
groups click on the render view in the
project browser if you zoom in to some
of these lights and click on them you
can see that they're already set up in
light groups now for more on light
groups in Revit Autodesk has really
great help sections in their
documentation to show you how to set
them up and use them so definitely check
that out if you're interested in
learning more about that in Revit let's
go to this light and see that's also set
up in a light group we have them all set
up for you in this project to make life
a little bit easier by using light
groups to control the light groups click
down here on the show rendering dialog
icon now make sure to set scheme to a
setting that includes artificial
lighting in the drop-down I'll select
Sun and artificial light here this will
enable the artificial lights button for
us to click this opens a dialog that
gives you access to all of the lighting
groups in the project grouped into
floors and sections you can see the
light groups and the lights in them as I
collapse all these lists here so we're
looking at just the light groups
themselves we can easily enable or
disable groups to make it seem like some
of the lights are turned off in the
render by just clicking the checkboxes
to clear them now I'm gonna turn off a
few random lights here including some
lights that you just can't see in this
view anyway that'll of course help with
render times now once you're happy with
the light groups that you've turned off
click OK and close out of this window to
switch over to the default 3d view and
restart the arty render I'll bring back
the VfB and you can see some of the
lights are now indeed off ok let's get
something in the background click on the
no light pulldown and select the Sun for
the environment light we want to give
this a nighttime sky so this is
obviously way too bright since
we set the exposure on the camera to
five earlier so instead of adjusting the
exposure on the camera I'm going to set
the Sun intensity to something really
small point zero zero zero one this
gives a nice gradient night sky in the
background
now of course you can use an HDR instead
of the Sun and that'll look more
realistic especially with a good
nighttime HDR image so the test arty
rendering is coming out like I like it
so I'll stop the arty to start a final
rendering close the Sun settings change
the quality to medium but leave the
resolution as is now to turn off the
material overrides let's go to the
material browser and check these two
overrides off and then close the dialog
select render with v-ray to kick off the
render we'll go ahead and elapse time
here a bit as the progressive render
resolves the image cleaner and cleaner
over time you can of course stop the
render at any time you wish once you
achieve the quality level that you like
and here we are a very clean rendering
after allowing the render to run for a
bit thank you for joining us for this
quick start video on exterior lighting
with v-ray for Revit
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