Join Paul F. Aubin for an in-depth discussion in this video Creating a walkthrough, part of Revit: Rendering.
- In this chapter we're going to create a walkthrough. Now a walkthrough is quite simply an animated procession of a camera moving along a user specified path. So in this movie, we'll set up the path, and we'll look at the basics of how to interact with the path, and get the points where we want our camera to go, and then in the subsequent movies, we'll fine tune it. So, I'm in a axonometric 3D view right here, and you could theoretically begin your walkthrough in a 3D view like this, but I find it much easier to start in a plan view.
So, you can use really any plan view you want, but I'm actually going to use my site plan, or rather a copy of my site plan. So I'm going to right click Site Plan, and duplicate that view. And then I'll rename it Walkthrough Temp. Now, because I duplicated my site plan, we're looking down on the roof of the building, and I'm actually going to want to walk along this portico here, so I really want to see that as more of a plan rendition. So, before I begin the walkthrough, I will scroll down here on the properties of the floor plan, locate the View Range button, edit that and I will drop the offset of the cut plane down to a floor plan height, which 4 feet ought to do the trick.
Now, there are still things that are not visible in this view, like doors and so forth, but that's not really that important for the purposes of the walkthrough, I just wanted to be able to see the points where I want to do the clicking. Now, I'm going to start over here by this tree, and I'm going to walk towards the tower, then turn, go down this corridor here, and then go inside the building into the lobby space. So we'll keep it a really simple walkthrough here. So, come over here to your 3D button, and instead of clicking the default 3D icon, you're going to click the little drop down next to it, and you'll find the Walkthrough button right there.
So I'll choose that. And then, I basically just need to start clicking now wherever I want to place camera points. Now these are actually going to be thought of as key frames, and we'll talk about that more in just a few minutes. So I'm going to click right here by the tree to get started, and then you're going to see this little cone on my cursor, that's actually the camera. And let me zoom in just a touch here. And I'm going to click over here in front of the tower, and then go inside the tower and click again. Now this is kind of important because I want to turn the corner right here, and what you'll see is, if I click another point right in front of the step here, and then just kept going down here, do you see how it kind of arcs out in a really long smooth curve? That's why you want to place that second point, because that'll kind of reestablish the direction that the camera's going in.
It tries to interpolate between the points that you click, and it always tries to do that with a smooth curve. So sometimes adding a second point when you want to turn the corner gives you a little bit more control. So now you could see that I'm moving down this portico here in a little bit more of a straight line. And I'll pick again here to straighten it out even a little bit more, and then stop right in front of the doorway here, go just inside the doorway and click again, same thing we just talked about, kind of come over here to the corner where the stairs are, maybe turn the corner there, and end up looking back out through the doorway.
Now when you're done clicking points, you just press esc one time, and that will stop placing points, but keep the walkthrough path selected. Now this is actually pretty important, because if you deselect the walkthrough path altogether, like if you click away from it, or if you press esc twice, or click your modify tool, any of the normal ways to cancel a command in Revit, then you'll lose this path, and you won't be able to get to this Edit Walkthrough button, or at least you'll have to know the trick on how to get to that.
So, what we want to do next is go to the Edit Walkthrough button, but let's say that I accidentally did deselect the path. So in this case I just clicked off next to it. If you look at your project browser, you will see that you now have a new Walkthroughs branch on the browser. If I expand that, you can see Walkthrough 1. Now, you could of course rename this here if you want to, so if you're planning to make more than one walkthrough, it's a good idea to name each one descriptively. In this example I'm only planning to make one, so I'm just going to leave the name alone.
But if you double click it, you're now looking through the walkthrough camera, and you can see that I'm actually at the end of the walkthrough, looking back out through the front door of the building. Now, how do you get to that Edit Walkthrough button because it's still not displayed here on the ribbon. So, what we do is similar to a camera view, if you select the frame of the camera, then that actually selects the object, and allows you to modify it, and notice here now, we actually see that Edit Walkthrough button.
Now I know that's not very intuitive, but that's why I wanted to point it out to you. So if you accidentally deselect the walkthrough, it's fairly easy to get back to it, but you just gotta know the trick. So let's click this Edit Walkthrough button now. And what you're going to see is a series of playback buttons appear here on the ribbon. There's also some additional controls down here. The way these playback buttons work is like any video player that you've used. You've got the ability to advance forward and backward frame by frame, or key frame by key frame.
So, notice that we've got two buttons here, Previous Frame and Previous Key Frame. Now the reason that these are great out here is because we're at frame 300 of 300. So when we generated the walkthrough, it created 300 frames, that's just the default. I could do Previous Frame, and now I'm at 299, and 298, and 297, or I could do Previous Key Frame. Now Previous Key Frame, I don't know if you can see here, jumped all the way back to where I was by the stairwell, and I'm looking at these wall sconces.
Well, each point that I clicked in the plan view to place the camera is considered a key frame. So if you want to jump back through your key frame points, you could do that, but that, you know, is still going to take several clicks to get all the way back to the beginning. The fastest way to get back to the beginning is to just simply click right here, and type in frame 1, and then press enter. And that will bring me all the way back to the beginning. Now, when you do that, notice that you actually have two tabs that are highlighted on your ribbon. We've got Modify Cameras and Edit Walkthrough.
Okay, well the Modify Cameras only has these controls really that are available to it. So let's click back over onto Edit Walkthrough to get back to the play controls. Now, notice that I'm looking right here at the building, and again now, I could either advance forward or backward, let's go back to my starting point again, or we could just click Play, play the walkthrough, and actually run through the space.
Now you can see that it's still doing some of those sort of swoopy moves, so we definitely have some work to do on this, because otherwise you might get a little dizzy the way that that thing was running, so in the next couple movies, we'll begin refining this walkthrough to kind of make it feel a little bit more natural, and enhance it to the point where we're ready to make a final presentation out of it.
- 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