Join Paul F. Aubin for an in-depth discussion in this video Outputting a walkthrough, part of Revit: Rendering.
- In this movie, we're gonna output our walkthrough. So after we've done all our preparations and we're relatively satisfied with how it plays on screen, then we're ready to actually output it to a file. Now, there's basically two options that are available to us to output our walkthroughs. We can either create a single movie file in the AVI format or we can create a folder full of image files. And with both of those, you can open them up in post-processing software and manipulate them. So if you have any kind of video-editing software, it will read in an AVI or it'll even allow you to take a bunch of separate image files and composite them together.
So let's take a look at the process that we use to do that. I'm going to go to the Application menu here, the big R, and down to Export. I'll scroll down over here to Images and Animations and you'll see that Walkthrough is available, so we'll choose that. And that will display a dialog which will ask us about the options that we wanna use in this export. So the default is to export all frames. And if you're gonna generate an AVI file, that's probably the best choice.
So you could choose All Frames here and then down here, under Format, you can choose among all the various Visual Styles that are available in any Revit view. Now, Hidden Line is gonna be considerably quicker than any of the shaded views and certainly of rendering, but you can see that we can go all the way down to rendering here. So the further down the list you go here, the more time it's gonna take to generate each frame. For this example, we're gonna keep it at Hidden Line but let's just briefly talk about what would happen if we chose something like Rendering.
The dimensions are currently 576 by 432. Well, if you generate a rendering of each frame at those dimensions, you're now generating 300 renderings at this size. Those are not necessarily big renderings, but still, consider the amount of time it's gonna take. You'd obviously need either a very fast computer or, more likely, what you'd wanna do is spread it out over multiple computers. So if that was your aim, if you actually wanted to do that and do a fully-rendered walkthrough, then what you could actually do here is, instead of using all frames, you could choose this option instead, a frame range.
So now, instead of doing the full 300 frames, maybe on computer one, I could do frames 1 through 50 and set it to rendering and let it generate those images. And then on computer two, I could set this to 49 through 100 and let it generate those frames and so on. If I was gonna do 50 frames per computer, for a 300 frame animation, it would take six computers, but when I come back in the morning, hopefully, if nothing went wrong, and none of the computers crashed, I'll have 300 fully-rendered image files spread across those various computers.
And I can pull them all together, open them up in my composition software, and composite them together into the final animation. So that's certainly something that you could do if you want the higher-quality, fully-rendered output. But for our example, let's just go ahead and use All frames and we'll stick with Hidden Line. Now, if you wanna do a quick test render, just to make sure that it's gonna work the way you expect, you could actually come in here and reduce the dimensions, maybe do like half the size that you see there, you know, 250 or something. When it comes over here, you'll see it adjust the other side to keep it proportional but in this case, I'm gonna set it to 100% and do the full-frame render.
Because I'm doing Hidden Line, I think it'll be fine. Now it's even possible to include a date and time stamp in the corner of the rendering, as you're generating it, so that's something you could do if you want to. I'm not gonna check that here. I'm gonna click Okay and then it will ask me where I wanna put this. So I'll put it in my Exercise Files folder. I'll accept the default name. If, when you get here, you realize, "Oh, I forgot to set something," there actually is an Options button here. It takes you back to the Length and Format dialog. You can make any adjustments you want and click Okay. Before I click Save, the "Files of type" will determine the format you're saving.
So, if I do *.AVI, it's gonna composite everything for me into a single movie file. If I choose any of these other formats, it'll create a folder full of images. So you might wanna click the little plus sign here and create a new folder, so that all your images go into the same folder and don't just get scattered loose in your project folder. So let me click Save here. That will ask me if I wanna compress my video. So the default is Full Frames (Uncompressed) or there are a series of codecs listed here, depending on what's installed on my machine.
I prefer to render it Full Frame (Uncompressed) and then, if I need to compress it, I'll do that in post-processing software. That's just my preference. So I'm gonna go ahead and choose Full Frames there and I'll click Okay. So it'll start running the walkthrough and you can see that basically along the way, it's just generating each frame. And then it will composite them together into an image file and let's take a look at what that looks like. So open it in your player of choice and then click "Play" and see how you did.
So you can see those speed adjustments that we made. Now I want you take note of what's going on there in the background. We might wanna go back and adjust the depth of the camera. Now, we talked about this in a previous movie, on regular camera views, but you can actually see it right here. You can see how it sort of tapers off right there. That's because the Far Clip offset of the camera is set to a finite distance. And so what we might want to do to fix that is, in this camera window, if we scroll down over here, instead of the Far Clip offset being at 100 feet, you could either increase this to a very large number or just simply turn off the Far Clip altogether, which I think for a walkthrough might be the better way to go.
And then you see all that stuff that's being cropped out in the background? That will reappear in the view. So those are the things you wanna look for when you generate these. So just like static renderings, it's a good idea to do some quick, draft walkthrough renderings as well, until you're satisfied with the results you're getting, and then do the final walkthrough overnight on several computers so that you maximize your amount of processing time. But that's the basic process to generating a walkthrough out of your Revit software.
- 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