Join Paul F. Aubin for an in-depth discussion in this video Understanding sun settings, part of Revit: Rendering.
- Continuing with our theme of configuring our daylighting, let's take a look at the Sun Settings dialogue. The Sun Settings dialogue allows us to configure a variety of settings with respect to daylighting so we can determine the time of day and the month of the year and we can even do animated solar studies in the settings that are available there. I'm currently in a site plan and I have the shadows turned on. The way you turn on the shadows is to just use this small little icon right here on view control bar. Now, right next to that is a little sun icon and if I click that, we can go to the Sun Settings directly from a small pop-up menu.
Let me move the dialogue out of the way so that we can see the site plan in the background. Under the Solar Study area of this dialogue there are four options. The default option is labeled Lighting. Now, Lighting is not accurate at all with respect to your location settings. If you watched the previous movie, we set our location in the world and we configured our north direction and made sure that both of those were correct for the siting of the building.
Lighting will ignore both of those. Lighting is the so-called over-the-shoulder lighting so if you're doing an elevation and you just want to get 45 degrees shadows, you would use the Lighting scheme. It would give you some nice shadows either going from the right or from the left. You can see that there are two preset schemes here where if you click on them they just change the angle here that is the direction of the shadows. Now, if I apply that, you'll see the shadow change, if I apply that you'll see the shadow change but it doesn't really have anything to do necessarily with the building.
In fact, if this is north pointing straight up, the sun would be down here, so it's unlikely that the shadow would be casting in this direction. Lighting is what you do if you just want to do a quick diagram. If you want the settings to actually match the Location dialogue and the north direction, you use one of these three options. Now, I'm going to start with Still rendering because that's mainly what we're concerned with and when I choose Still rendering, if you look over here on the right-hand side, you'll notice that the location is now showing.
This is the location that we configured in the previous movie. if you needed to change it, you could actually click this little browse button right here and that takes you right back to the Location dialogue. Beneath that, you have the date and time. Now, all of these settings are on what we call an < In-session, Still > which means, basically, you can change them the fly. If you just want to try a few different things before you commit, use that < In-session, Still >. Got your location, your date and time, let's click Apply to see what happens and as you can see it adjusts the direction of the shadow.
This is for about 3:00 PM, what would happen if we changed that to 10:00 AM? You see the shadows would move in the other direction. Now, it's a little bit more accurately reflecting what's actually going on in the building geometry. Now, notice that beneath that there are several presets. If you select any one of these presets, what that does is it changes the date and time for you based on the description that it's named after. This is the Summer Solstice so it's on June 21st.
Now, the year is 2010 but I doubt that there'd be much difference between the summer solstice in 2010 and 2015 but you are welcome to change the year if you like. When you click Apply, of course, in the summer solstice the sun is very high in the sky and so at noontime we'd have almost no shadow. Compare that to the Winter Solstice and you should have a longer shadow. You can work with the existing presets that are here or down here you can actually duplicate or rename them or even delete them.
You can create as many presets as you like for different times of the day and different dates on the calendar. Once you understand how the Still Solar Study works, it's very similar for the Single Day and the Multi-Day. The only difference with each of these is you actually get a range of dates and times. Here with the Single Day, I'm getting one date but I get two times. Then with the Multi-Day, I get two dates and times. The way this works is you can actually create an animation of the shadows moving across the surface of the ground over the course of several hours or over the course of several days.
Now, we'll talk more about this later in the course but the essential settings are largely the same and as you can see, we can still do presets for those as well. If the sun is your primary source of lighting for your rendering, then in addition to getting the location and the north direction correct, you're going to want to take a little bit of time here in the Sun Settings and decide the optimal time of day and date of the year so that you can get the best sun casting into your space and give you the best results for your rendering.
- 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