3ds Max and Revit Interoperability - Part 10 - Night Scene Lighting

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Industry
  • Design Visualization
Subject
  • 2015
  • Interoperability
Products
  • 3ds Max
Skill Level
  • Intermediate
Duration
5 min

3ds Max and Revit Interoperability - Part 10 - Night Scene Lighting

In this tutorial, you experiment with a Nighttime lighting scenario based on an exported Revit scene. You test out the default parameters and then learn to improve on them.

Notes

  • Recorded in: 3ds Max 2015
  • This tutorial is intended for use with 3ds Max version 2015 or higher.

Transcript

00:00:06 --> 00:00:12
In the last movie, you used a Revit preset for a daytime scene, and learned to improve on it.

00:00:12 --> 00:00:15
In this movie, you do the same with a Nighttime setup.

00:00:16 --> 00:00:18
Reset 3ds Max.

00:00:18 --> 00:00:28
Use File > Link FBX to link the fbx file you saved for nighttime purposes. You can also use the provided file named: room_night.fbx

00:00:28 --> 00:00:32
Make sure you use the Combine by Family Type as you have learned.

00:00:34 --> 00:00:41
As you can see, even for a night scene, a Daylight System is still getting imported prompting you to use Exposure Control.

00:00:42 --> 00:00:49
As mentioned in the last movie, Exposure Control is needed to compensate for the brightness of the sun, much like on a real-world camera.

00:00:49 --> 00:00:56
An EV default value of 15 works for daytime though, so you most certainly need to adjust that in a moment.

00:00:57 --> 00:00:58
Click Yes to proceed.

00:00:59 --> 00:01:04
Once the scene is loaded, you will need to do a few actions similar to what you did in the last movie.

00:01:04 --> 00:01:08
First, click an empty spot to ensure all objects are deselected.

00:01:09 --> 00:01:13
Also make sure the viewport is in Realistic mode and set to be lit with scene lights.

00:01:14 --> 00:01:19
This will make the viewport temporarily dark which is expected for a night scene.

00:01:21 --> 00:01:24
Also hide the curtain wall,

00:01:28 --> 00:01:32
and set the rendering resolution to HDTV.

00:01:38 --> 00:01:42
For good measure, disable Adaptive Degradation as well.

00:01:44 --> 00:01:46
Zoom back and take a look at the scene.

00:01:47 --> 00:01:55
In an opposite situation to the last movie and the daytime scene, this time around, the artificial lights are enabled.

00:01:56 --> 00:02:02
The Daylight System on the other hand shows the Sun component in black, which is an indication it is disabled.

00:02:03 --> 00:02:07
Sure enough, this can be confirmed in the Modify panel.

00:02:16 --> 00:02:23
In the Motion panel on the other hand, you can see the time of day set to 22:00 or 10pm, as defined in Revit.

00:02:24 --> 00:02:29
This also accounts for the fact the viewport is dark, but it also has to do with Exposure Control.

00:02:30 --> 00:02:37
More on that in a moment. For now, press C to set the view to display the camera and test render the scene again.

00:02:38 --> 00:02:44
It doesn't look like much at all, certainly not like a night scene you'd expect. There are a couple of reasons for that:

00:02:44 --> 00:02:48
Right now, only the artificial lights are barely showing.

00:02:48 --> 00:02:56
This is because currently, the EV value is still set to the default 15 value, which is more of a daytime setting.

00:02:56 --> 00:03:02
Go to the Environment dialog and set the EV value to 3 or 3.5.

00:03:05 --> 00:03:12
You'll notice an immediate change in viewport shading, one that's more consistent with the current lighting scenario.

00:03:12 --> 00:03:13
Test render again.

00:03:14 --> 00:03:19
Well, the lights certainly look better but the background doesn't work too well for a nighttime render.

00:03:20 --> 00:03:24
As mentioned in the last movie, the Daylight System relies on three components:

00:03:25 --> 00:03:33
A Sunlight as a direct light, a Skylight to simulate the atmosphere, and an mr Physical Sky map for a background.

00:03:34 --> 00:03:40
Unfortunately, Revit presets only take care of enabling or disabling the Sun direct light

00:03:40 --> 00:03:44
So, it is up to you to adjust the other two components manually.

00:03:45 --> 00:03:48
Disable the background and try again.

00:03:55 --> 00:03:59
It's better but still too bright for a night scene.

00:03:59 --> 00:04:07
The overall brightness, especially outside is happening because of the Skylight system, even though it is 10pm.

00:04:07 --> 00:04:15
Disable the Skylight and try again. In effect, anything related to the Daylight System is now disabled.

00:04:16 --> 00:04:24
You are now relying only on artificial lights and the render shows that. This looks much closer to what a night scene should look like.

00:04:24 --> 00:04:32
Ultimately, you can add exterior artificial lights and perhaps even a night background image but I won't be getting into that right now.

00:04:32 --> 00:04:39
One important point remains: you have learned that at all times, Revit exports a Daylight System along with the FBX file.

00:04:40 --> 00:04:48
But what if you are linking your Revit model to a scene that already has a Daylight System? One that you have already set up to your liking?

00:04:48 --> 00:04:58
The answer to that is to create a custom import preset, so that when you link the FBX file, you specifically bypass the Revit Daylight System.

00:04:58 --> 00:05:00
This is what you do in the next movie.
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Tags
  • 3ds Max
  • 2015
  • Interoperability
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