Join Paul F. Aubin for an in-depth discussion in this video Working with lighting groups, part of Revit: Rendering.
- When you have a lot of artificial lights in your model, it can become difficult to manage them, particularly when you're trying to decide which ones you want to use to generate a rendering. So, in this movie, we're going to look at the Lighting Group feature. And the Lighting Group feature essentially provides an on-off switch to a collection of lights that makes it much easier for you to decide exactly which lights you're using in a particular rendering. Let me give you an idea of what I mean here. I'm in a reflected ceiling plan, and you can see that there are several lights in here. I've got lights in the offices. I've got some here in the conference rooms. More over here.
But, maybe I want to do a rendering of the lobby, right? So, I go over here to this view called "3D Lobby," and I open it up. Now, you can see here in the background that there are some down-lights right here, there are some more up here. There's some wall sconces behind me, over here, and there's a desk lamp right there. Now, all of those lights would contribute to this rendering. So, they would all be important. Even the ones that are slightly out of frame would still contribute light into this scene. So, those are all important to include. However, several of those other lights that we saw here in the reflected ceiling plan, like all of these lights in these offices and the ones down here in the conference room, would contribute no light to this reception area, at all.
So, if we don't have a way to turn those lights off, then we're going to spend lots of computation time while Revit generates the light from those light fixtures, only to decide that it doesn't actually affect the rendering, at all, and basically just wastes time. So, lighting groups are just a way to help us speed up the rendering process and make it more efficient. So, let's take a look. Some of these lights are already assigned to groups. So, if I zoom in here and select one of the lights, you'll see here that, on the options bar, it says "Light Group," and I've created a group called "Office 114." Now, if you open up that drop-down list, what you'll actually see is that I've created groups for many of the offices throughout the model.
Now, if I do the same thing with this strip light here in the conference room, you'll see that it says, "Light Group None." Now, if I hold down my control key, and I select all four of these light fixtures, what I can do is very simply just open up this list and assign them to a light group. Now, I've previously created a light group called "Conference Room 110," I just didn't add any lights to it yet. So, let's just go ahead and choose that. And it's saying you're about to move these lights to that group. Is this okay? And I'll confirm that. And now, if I select any of these lights, you can see that they're part of that light group.
So let's do the same thing with all of these lights here in this corridor. So, this is Corridor 103, and if I make a selection around all of those lights, and then open up the list, you can see here that I've got a light group called "1st Floor Corridor." And again, it will confirm, and I've now placed all those lights in that group. So, those are the existing lights, and moving them to the groups that I need. But, what happens if you realize later that you want to actually change the lighting scheme in a room? So, for example, here in the conference room, perhaps I want to add some can lights over here, on the left-hand side, to light up a credenza that might be down below.
Well, I'll go to my Component tool, and I'll open up my type selector, and I will find an appropriate light fixture, and then I'll just go ahead and place a few of these in. Now, if you want to modify an existing light group, what you do is you simply select one of the existing lights that's already part of that group, and there's an "Edit" button right next to it. So, I'll click that, and that puts me in this edit mode, where I can now use the "Add" and "Remove" buttons to add and remove lights from this group.
So, I'll choose "Add," and I'll select each of these lights. And then when I'm done, I can click "Finish." And so now, all of these can lights are part of the "Conference Room 110" group. So, it's very easy to add them in after the fact. Now, going over here to the reception area, you don't actually see the sconce lights that I mentioned over here on the right-hand side. You also don't see the table lamp that's sitting on the reception desk. So, for those, I'll go back to the level one floor plan.
So, I've got these three sconce lights here, and this desk lamp here, and I want to make a group for those. So, you could select any one of these lights, and when you open up the drop-down list, what you're going to notice is that I don't already have a reception, area or a lobby area, lighting group. But there is an "Edit New" option right here. So, I'll chose that, and that will bring up the artificial lights dialogue. Now, if you scroll through here, you're going to see all of the lights are listed here and each of them is indented beneath their groups.
Down at the bottom, you'll see the ungrouped lights. Now, what we can do is, over here, we can click "New," and create a new group that I called "Lobby Lights," and it will show up as empty. Now, I can select any of the existing lights, using my shift key here, and you'll see them highlight in the background. And then I'll click this "Move to Group" button right here, and my new lobby lights will appear in the list, and I can click "Okay." If your Ungrouped Lights is empty, that's good.
That's what you want, because especially in large projects, you want all of your artificial lights to be in groups. This will give you much more control over them, when it comes time to render. Now click "Okay," and that completes the setup of my groups. Now, we're going to talk about rendering in detail, in the next chapter, but I just want to quickly open up the render dialogue. So, let me go back to a 3D view, because you have to be in a 3D in order to render, and let's click the render icon right here to show the rendering dialogue.
Where the Light Groups feature becomes important is here in the rendering dialogue, because if you change the lighting scheme here to any of the schemes that include artificial lights. So, I'll choose this "Interior Sun and Artificial." That will display the artificial lights button. You can click that, and that gives you access to all of your light groups. Now, sure, you could go in and individually check and uncheck individual lights, but you would only see them given to you by description, based on their family name and type name.
It wouldn't tell you anything about where they're located. That's why it's so important to have your light groups, because here, I could say, "Well, I do want "the 2nd Floor Corridor, but I don't want "the Office 114, and I don't want Office 113," and with a single click, it turns off all of those lights. And therefore, you're managing in a very effective way exactly which light sources you want to contribute to your rendering.
- Creating 3D views and 3D cutaway views
- Adding details to the model
- Creating and editing materials
- Working with the sun system
- Working with lighting groups
- Configuring render settings
- Preparing a cloud render
- Creating a walkthrough
- Rendering a plan