Join Paul F. Aubin for an in-depth discussion in this video Fine-tuning walkthrough frames, part of Revit: Rendering.
- In this movie, we're gonna continue to fine tune our Walkthrough, and specifically look at ways that we can edit the individual frames of the Walkthrough. So, I've got two windows open here on screen, and I'm looking at the Walkthrough here on the right, and I'm gonna select it here, and then I've also opened my temporary plan view over here on the left, and I just tiled the two windows, and the reason I did that is because you may recall that we have to select it here to get to Edit Walkthrough, but I actually want to do the editing here in the plan view, so tiling the windows can just help you do that.
So, I'm actually a little bit along the path in the Walkthrough view over here, and you can kinda see that here in the plan view that my camera is actually right inside the tower there. Now, you might remember in the previous movie that when we were walking down this path, it took a little bit of a swoop right here. It still kinda felt like we were on a roller coaster a little bit, so I commented there about how what we might want to do is introduce another Key Frame along the path in order to smooth that out. So, if you've got the Walkthrough camera selected, and you're in the Edit mode here, when you look at the Options bar, under Controls, this is actually a drop-down list, and the default is the active camera, but there's actually a mode to edit the path itself or to add and remove Key Frames.
So, I want to actually add a Key Frame, so I'm gonna choose that option, and then when I move my mouse into the scene here, you'll notice that it senses the path, and I can click a point anywhere where I'd like that new Key Frame to go. So I'm gonna go about halfway down the corridor here and just click right there, and you can already see that it sorta straightened out the path just a little bit. Well, let's go back to the Edit Walkthrough tab over here, and then I'm gonna choose Next Key Frame, and then Next Key Frame again, and I'm gonna change the focus here back to the active camera, and then that gives me that little pink dot again, and this way I can go up and down the path and make adjustments to the direction that I'm looking, and by doing it with the other window tiled on the right, you can actually see it in real time as you make those adjustments.
So this is how you can really start to fine tune that path and the direction that your head is looking in. Now, the other thing that I want to look at is, in the last few movies, we've noted how we could move along to particular frames along the path, but all the while the number of frames has been 300. So, where that actually comes from is if you select the path, go here to Edit Walkthrough, and you actually look on the Properties Palette, when you scroll down here, at the very bottom, you'll see Walkthrough Frames, and it says 300 on this button, and that's the total number of frames that this animation is using.
Now if I click that button, it will open up the Walkthrough Frames dialog. Now, the first thing that you could do here is if you want to actually change the length of the animation, then you could put in a new total number of frames. You could also adjust the frames per second. So at the moment, I've got 300 frames, and 15 frames per second, so my total time for this animation is 20 seconds. If I adjust either of these numbers, it'll have an impact on the others, and if I click Apply, now I'm 10 frames per second, and the total time is 30.
Or I could instead leave this at 15, change this to 400, click Apply, and now my total time is 26 seconds, but I'm still back at 15 frames per second. So, you can make adjustments like that to kind of further refine exactly how long the duration of the animation is, and then the more frames you introduce, the smoother it will play when you play it back in real time. Just for point of reference, most video uses a frame rate of somewhere between 24 to 30 frames per second, depends on whether it's television or movies, but it's usually in that range.
So, if you look here at 15 frames per second, we're actually a little bit lower than what's considered the standard for either movie or television, so this might appear a little bit choppy by comparison. So if you wanted to increase that number of frames, that might necessitate adding to your total frames in order to keep it smooth and to keep the duration where you want it to be. Now, the other control in this dialog is the Uniform Speed. By default, what it does is it just simply takes all of your Key Frames, and it interpolates their position along the path, and therefore how many individual frames are needed between each Key Frame.
So, for example here, you can see Frame 1 is at Frame 1. Frame 2 is at 89.3. Frame 3 is at 117.4 and so on because with Uniform Speed, Revit is doing an equal number of frames all the way along the path, so it just figures out how many are between each Key Frame. If you uncheck this, you now have access to each individual Key Frame, and you could actually start to make adjustments here. Now, I can't adjust what frame it falls on, but I can modify the accelerator.
So the way that this would work is here's my first, second, third, fourth, I'm at about the fifth Key Frame right now. So if I wanted to maybe speed up as I move through the tower and then slow down as I'm walking down the corrdior, what I could do is, I could, maybe starting here at Key Frame 3, I could put an accelerator of about 1.5, and then that's gonna speed up until I get maybe to Key Frame 5, and then it's gonna drop back down again, and then perhaps I want to slow down here to about .5, and then when I get back to here, it speeds up again.
So, what that does is it sort of redistributes all of the frames along the way, and you can see these numbers adjusted and the speeds over here adjusted, and when I click OK, I'm not really sure how effective that's gonna be, but let's take a look. Let's click over here on the right hand view, and let's back up to the first frame, and then click our Edit Walkthrough button and click Play. Now right here, it should speed up a little bit, and then it should start to slow down as we're walking down this path.
Then it goes back to normal speed, and then when we walk through and into the space, it's back to normal speed again. Now clearly there's some fine tuning that we still want to do, but now you have all the tools that you need to be able to go through and very carefully, kind of, walk through each Key Frame, or each setting in both the Frames dialog or interactively on the screen, and make the adjustments until you're completely satisfied with how the movement down the path runs.
- 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