Join Paul F. Aubin for an in-depth discussion in this video Setting your location, part of Revit: Rendering.
- In this chapter we're gonna make sure that the location of our building is set correctly for its actual geographical location in the real world. The reason that this is important for us to do is if we're planning to use sunlight or day lighting in our renderings then we're gonna wanna have all of this configured correctly, so that shadows crest in the correct location, and that we get the right intensity of sunlight and so on. So the first step is I'm going to go to the Manage tab and click the Location button. Now this is actually the Location Weather and Site dialog, and it comes in a little small, so let me just increase the size of that a little bit.
And there can be up to three tabs in here, we're seeing two of them right now, Location and Site, but there's also optionally a Weather tab depending on your version of Revit. Default Location tab gives us an internet mapping service, and the easiest way to set your location in the world is to just simply type in a project address. Now, you don't have to actually type in the full address, you can just type in your city. So you can just type in the city, like Carpinteria, CA, and when you press enter, it will run the search and take you directly to that location.
Now, it's important to at least get in the basic correct geography, because the sun in California is a little bit different than the sun in Massachusetts and so on, so this is how Revit will determine your sunlight conditions when you use day lighting. So let me go ahead and click OK on that dialog. So that gets us located in the correct geographical location, but we also need to consider our orientation on the site. Obviously, our orientation on the site will have a big impact on the direction that shadows cast.
So if I go to the site plan, this is typically where this is achieved. Now, depending on your situation if you're the first one that's opened up these dialogs, and made these changes, then you might still be looking at the default behavior of a Revit project, in other words you'll notice here that I have these two icons visible on screen, this little triangle right down here, which is the survey point, and this other one is a little tough to see but it's right there in the middle of the screen, that is the project base point. Now, if those have not been configured yet then they're often sitting right on top of each other, roughly in the middle of the screen.
In this case you could see that they've been shifted relative to one another, so somebody has already done the setup in this project. That would be fairly common if you're joining a project team, and they've been working for a while, and you just wanna generate some renderings, so this is actually a pretty common scenario. However, if it hasn't been setup yet, then usually the civil engineer gives the information that's necessary to get the survey point in the right place, and usually the project base point is related to some feature on the building itself, but of course they can be set up in a variety of different ways.
What we're most concerned with is making sure that the orientation of north is properly set up. Now, if I select one of these things you can see that this thing is actually at an angle, so that tells me that somebody has already set up the north direction in this file. So the other place that I can see that is back in the Location dialog on the Site tab. You can see right here that it says Angle From Project North to True North, and it's about 58 degrees.
Now, for Revit north is always up, so if you wanna see the result of that angle, then you need to change from project north to true north. Project north as you can see is usually parallel and perpendicular to the building itself, but if we look over here on the Properties palet for this Floor Plan and scroll down, we can see an orientation parameter, and I can change that from project north to true north, and when I do it will actually rotate the building. That's because north is still pointing straight up, but now it orients the building relative to that direction of north, and if you were to turn the shadows on, which I can do with this little icon right down here, now the shadows will cast in the correct direction relative to the building, so you can imagine that if the north direction isn't oriented properly then regardless of what time of day you set the shadows will always be in the wrong spot, so it's a pretty important step.
Now, if you need to rotate the true north there's a command for that here, and the details for that are covered extensively in the Managing Location Coordinates with Revit course here at Lynda.com, so you're welcome to check that out. So if you're planning to use daylight for you rendering then a necessary first step is to make sure that you go through the process of setting your location in the physical world, it's as easy as typing in an address in the mapping service, and then making sure that north is pointing in the correct direction, so that you get your shadows displaying properly.
- 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