Adding lighting to a rendering scene

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If you walk into a room and there's no windows and no lights, it is dark.

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In Revit, if you render a room with no windows and no lights, it's dark too.

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It's as simple as that. Lighting affects the rendering. To make an effective presentation,

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the lights must be controlled and that's what we'll be looking at in this video.

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So, let's jump into Revit to see how that's done.

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Once again here in Revit 2024, let's open up the small medical center model that we've been working on.

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If you didn't have a chance to complete the previous lesson, click on small medical center lighting.

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Make sure that you're in the 3D view for the SECOND FLOOR - BREAKROOM.

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And if not in your project browser expand the 3D views category and double click on SECOND FLOOR - BREAKROOM.

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You'll notice that there's no lights in this break room.

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So, let's add some troffer lights in the ceiling and also, some sconces along the walls.

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If we add some lights, let's go to the reflected ceiling plan.

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So, my project browser, ceiling plans, double click on "SECOND FLOOR".

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Here in the lower left corner is a break room.

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Let's go to the systems tab and under electrical lighting fixtures,

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let's see what lighting fixtures we have in our model,

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nothing really suitable.

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So, we need to load the family.

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We go to the lighting folder, we want to pick MEP lights and these are for internal purposes.

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Scroll down.

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And here's our Troffer Light 2X2 Parabolic because we have a 2X2 ceiling grid.

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Let's open that. You notice that I can't place it on the ceiling because it wants to place it on a vertical face.

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So, I click on "Place on face" and now I see a preview of it.

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I'm going to do is I'm just going to make sure that I select one of the grid lines.

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Then I'll use the align tool to align it properly.

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So, click "Modify" to deselect it.

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I can type in AL for align,

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select my destination line and the line from the ceiling fixture and it lines it in place.

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Hit "Modify" to finish my align command.

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Now I want to place more lighting fixtures.

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So, I select the original lighting fixture and copy it.

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I want to make multiple copies and constrain the set. So, I can only copy it in either the X or the Y direction.

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Select my base point, copy one to this location.

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All the way over.

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Constrain is still set and I can move down and copy them across,

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hit the "Modify" button or hit "Escape" to deselect it.

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I finished with my troffer lights.

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Now I want to insert some sconces.

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So back on my systems tab, I go back to my lighting fixtures and I need to load a family.

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For my sconces, scroll down.

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Here's my sconce light up light.

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I want to place this one on my vertical face.

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I think this is where my sync is.

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Select another face lining up with this row.

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Now it's on the wrong side so I can simply flip it.

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Select the next one down and flip that as well.

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For my fourth one, go opposite the sync, flip it again.

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Now, I want to show you something.

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So, I'll get modified to deselect that.

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And what I want to do is I simply want to copy this lighting fixture across.

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So, I select the lighting fixture.

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I go to copy it from this base point, let's say over to here, just at the door.

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Now it's telling me that the instant origin does not lie in a host face.

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What this means is, I simply copied it but it's not set to the host at the wall.

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So, I select the lighting fixture and in my rib and I can pick a new host and I select the wall.

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And now it's hosted.

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Hosting means that if I move the wall, the lighting fixture will move as well.

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So, we selected these lighting fixtures straight from the library.

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Let's check their properties to make sure that they're set according to our design intent.

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So, I select the troffer light and I go to the properties of it.

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Notice in the properties, they have a variety of electrical properties in this.

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Scroll down.

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One thing I want to make sure of is for rendering purposes that I have the appropriate IES file.

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The IES file will dictate how the light behaves during rendering.

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So, you want to make sure that you do have an IES file.

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For my light loss factor let's make that about 1.5 and click "OK".

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The initial intensity, 40 watts is a bit low.

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Let's make that 60 watts.

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And you notice as I enter 60, the other values increase automatically. So, we'll keep it at 60 watts.

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That's all will change.

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The last one is the light color.

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I have a drop down here for the presets.

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I want to make this one fluorescent daylight, it'll be a bit warmer.

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Let's do the same for the sconce.

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Edit the type.

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Just make sure that everything is properly set.

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Notice the default elevation is 6 ft 4, which is fine.

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I do have an IES file.

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For the light loss factor, let's again crank that up to 1.5 and let's make this bit stronger as well.

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So rather than 60 watts, let's change that to maybe 100 watts.

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The initial color is fine.

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But for my color filter, let's change that to a light blue.

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Okay.

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Now, for rendering purposes, it is highly recommended that we create a light group for these lights.

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So, when I render this, only these lights will be affecting the rendering rather than all the lights in the model.

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So, I select one light fixture and in my options bar, I have my light group which is set to none.

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I want to create a new light group.

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So, for my group options, I select "New", SECOND FLOOR - BREAKROOM will be my new light room.

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These are chronologically listed.

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So, I know that the troffer lights and the sconces lights that I just put in will be at the bottom of the list.

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You notice as I select one, it gets highlighted in my model,

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hold the shift key down and I have all the troffer lights and sconce lights that I selected.

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And I want to move this to a group and the group is my SECOND FLOOR - BREAKROOM.

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Let's go up to the top.

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Here's my SECOND FLOOR - BREAKROOM group and it has all the lights.

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Let's move that out of the way and click "OK".

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Okay. We have our materials, and we have our lights.

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What comes next is the action.