This next picture has the Drop Off Rate set at 2.0. This means that at the outer edge of the circle of light coming from this fixture, it has a clear (harsh) edge like a flashlight in the dark with a concentrated beam: Here’s my explanation: In the pictures below, the first picture has the Drop Off Rate set at zero. Chances are that you will get the best effects with something greater then 0 but less then the 7.5 default.” This will look more like the kind of spot light used in theater then in houses. Try setting it at 0 and you will see the same light at the outer edge as you do at the center. A drop off of 7.5 means the light will drop off fairly quickly as it gets to the outer edge of the cone. Place a single spot light in a room pointing down and leave the cut off angle at 60 degrees. Try experimenting with the values to see the effect. Quote: Dermot Dempsey “The Drop Off rate for a spot light controls how quickly the light drops off from the center of the cone to the outer edges of the cone. The next item we want to look at is the “Drop Off Rate”. So far, for interior raytraces, I prefer to set the Cut Off Angle at 120º. A Cut Off Angle of 60º will give a much wider beam of light, more like a real spotlight: The next item to adjust is the “Cut-Off Angle”.A Cut-Off Angle of 5º will give a narrow beam of light straight down to the floor. This might be too high in certain scenes, and if so, you can back it off to around 80%. Next, Un-Check “Auto Intensity”, and move the slider up to 100%. Of course the first thing you want to do is to hit the drop down on “Type”, and select Spot Light. Spot lights seems to work the best for interior raytraces, but they require some adjustments. So, I won’t choose a parallel for an interior raytrace. They are the best type of light to light up a room in a render view, but I don’t like them at all in a raytrace view, because they give a big bright spot on the ceiling all around the fixture, like the light was shining back up towards the ceiling.Ī Parallel light won't do you any good inside (aside from through openings). Point lights give a pretty even spread of light in every direction. This information can be found and adjusted by selecting a light fixture, either in plan view or 3D view, open the item, then go to the “Light Data” tab in the Dialog Box. Any light you get from the library can be set to 1 of 3 different types of light source, regardless of what kind of fixture it is. When a light fixture is placed in a plan from the library, it does not necessarily have the best settings for an interior raytrace, but so far, I have noticed they are set up to get a pretty good scene for renders. Next, some info about light source types. This will make the bulb on the light look like it is ‘glowing’ in a raytrace view, and look more like an actual light. Next, click on “Edit”, go to the “Properties” tab, Under “Material Class”, make sure “General Material” is selected, and move the slider for “Emmisive” all the way up to 100%. Chief’s new raytracer will not be drastically slowed down by a complicated model, but it will be drastically slowed down by too many lights, even if they are on a different floor.īefore we adjust the light type, you should open your light fixture, go to the Material tab, select “Bulb”, click on “Plan Material”, select “Lighting, White”. The reason for this (I learned the hard way) is if you have 165 lights on in your model, a “Quick” raytrace might take 7 hours, and if you only have 6-8 lights on, it will drop down to 5-6 minutes. When you set up your raytrace, you will turn on just the lights in your scene. Then just click on the check mark in the box of any light fixture, and this will turn them all off at once. This will “Group Select” all the lights at once. Select the first light, scroll down to the last light, hold your shift key and click on the last light. ![]() ![]() There is a lot more involved in getting a stunning raytrace, but that’s also something you can accomplish in Chief, with some effort.įirst thing you want to make sure of, is that all the lights in your model are turned off! Do this by going into “3D>Lighting>Adjust Lights”. The purpose of this article is to enable you to get a really nice raytrace, in under 10 minutes. ![]() #Chief architect x9 creating layout videos how to#Let me start off by saying that I am not an expert in lighting, but with the help of some of the Chief Peeps, I have at least been able to get a working knowledge of how to get lighting set up for interior raytraces, in Chief’s new raytrace engine.
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