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SketchUp Rendering Using V-Ray
Illustration by Richard Downs

Exploring the Spotlight


From:

SketchUp Rendering Using V-Ray

with Brian Bradley

Video: Exploring the Spotlight

Having looked at using both the Omni and Rectangle Lights in V-Ray SketchUp, it's time now to continue our exploration of our artificial light types and have a look at the V-Ray Spotlight. Of course, the first thing we need to do is add our light object into the scene, so again, let's come to the Window menu, open up our Layers dialog, and this time we want to come to the Light_Spot layer, put a check in that to bring our Spotlight into the scene, and then of course we can dismiss our Layers dialog. The spotlight is a slightly newer light type, added I think in V-Ray SketchUp version 1.48.
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  1. 4m 30s
    1. Welcome
      1m 14s
    2. What you should know before watching this course
      2m 33s
    3. Using the exercise files
      43s
  2. 7m 52s
    1. Installing V-Ray
      2m 27s
    2. Locating V-Ray tools and features
      5m 25s
  3. 39m 2s
    1. Creating natural daylight with the V-Ray Sun and Sky
      7m 41s
    2. Using the Omni Light
      7m 9s
    3. Exploring the Rectangle Light
      6m 2s
    4. Exploring the Spotlight
      4m 37s
    5. Exploring the IES light type
      5m 0s
    6. Setting up image-based lighting
      8m 33s
  4. 29m 40s
    1. Working with irradiance mapping
      12m 8s
    2. Creating a light cache solution
      6m 14s
    3. Using the DMC engine
      11m 18s
  5. 23m 11s
    1. Overview of the physical cameras
      5m 16s
    2. Understanding the Exposure controls
      6m 23s
    3. Handling perspective correction
      3m 4s
    4. Setting up for a depth-of-field effect
      8m 28s
  6. 44m 59s
    1. Introduction to V-Ray-specific materials
      9m 41s
    2. Creating diffuse surfaces
      9m 44s
    3. Creating reflective surfaces
      8m 2s
    4. Creating refractive surfaces
      9m 53s
    5. Creating translucent surfaces
      7m 39s
  7. 44m 8s
    1. Using fixed-rate sampling
      10m 21s
    2. Working with the Adaptive DMC engine
      11m 48s
    3. Controlling the Adaptive Subdivision sampler
      10m 15s
    4. Exploring subdivs and the DMC Sampler controls
      5m 52s
    5. Manipulating color mapping
      5m 52s
  8. 33m 39s
    1. Adding displacement to materials
      10m 48s
    2. Using caustic lighting effects
      7m 37s
    3. Creating occlusion effects
      8m 13s
    4. Creating a non-photorealistic render (NPR) with the Toon material
      7m 1s
  9. 1m 21s
    1. What's next?
      1m 21s

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SketchUp Rendering Using V-Ray
3h 48m Intermediate Sep 21, 2012

Viewers: in countries Watching now:

Create highly realistic 3D architectural drawings with V-Ray, a popular third-party renderer for SketchUp. This course shows how to take a single scene with interior/exterior elements and add lights, move cameras, and enhance objects with translucent and reflective surfaces. Author Brian Bradley explains concepts like irradiance mapping, perspective correction, and fixed rate sampling, while showing how to leverage each of the V-Ray tools and its material and lighting types to achieve specific effects.

Topics include:
  • Installing V-Ray
  • Creating natural daylight with V-Ray Sun and Sky
  • Bouncing light around with irradiance mapping and light caches
  • Setting up a depth-of-field effect
  • Creating diffuse and reflective surfaces
  • Working with the Adaptive DMC engine
  • Manipulating color mapping
  • Adding caustic lighting and occlusion effects
Subjects:
Architecture Rendering CAD
Software:
SketchUp V-Ray
Author:
Brian Bradley

Exploring the Spotlight

Having looked at using both the Omni and Rectangle Lights in V-Ray SketchUp, it's time now to continue our exploration of our artificial light types and have a look at the V-Ray Spotlight. Of course, the first thing we need to do is add our light object into the scene, so again, let's come to the Window menu, open up our Layers dialog, and this time we want to come to the Light_Spot layer, put a check in that to bring our Spotlight into the scene, and then of course we can dismiss our Layers dialog. The spotlight is a slightly newer light type, added I think in V-Ray SketchUp version 1.48.

It is, again, an extremely powerful and versatile lighting tool that can be configured to work for us in a number of ways. As I have just added this new light object into the scene, of course I do want to come and take a test render, just to see what kind of emission pattern we get from this light type. What we get of course is a very unique look from our Spotlight. We have the expected circle, or spot of light, as it is shining down onto the floor. We have also interestingly been able to capture the cone of light emission.

You can see the shape of that in our render. We can also see, because our spotlight is a very focused light type, that we're getting a much smaller amount of light balance in the scene. You can see we have lots of dark areas in our test render. Well, let's again have a look at our control parameters for the Spotlight object, so let's just move our Frame Buffer to one side. Let's select our light object and again open up the Light Editor for ourselves. We do of course want to keep focused on our test render, so let's just move the control parameters for this light object off to the side, and then we can just make a comparison of what we see in the scene with our actual controls.

Many of which will by now be very familiar tools. You can see that our intensity controls are as per our previous light types, as are the sampling controls available tools. We do also see that our shadow settings are identical to those found on our Omni Light, including the return of our Shadow Radius setting. This means we can set soft edge shadows inside the Spotlight effect, if that is what we want. Of course, we do get a number of controls that are new tools, for instance, these Barn Door controls.

These are really designed to help us mimic a real-world spotlight that oftentimes will have four flaps attached to it. These allow the user to focus or defocus light in a scene as is needed. Another familiar control is found at the top of our Options section. Once again, we have control over the Decay, or falloff, of light from our spotlight. By default, the realistic Inverse Square value is set, but as with our Omni light, we do have all the options available should we need them. We do have a new Falloff value in this Penumbra Falloff control.

This is designed to work in conjunction with our penumbra angle to give us a nice soft edge to our Spotlight effect. In fact, if we just enter a value in here of, say, .25, we'll be able to take a look at how that effect is working. So let's just click OK and again take another render. What we get now is instead of that harsh termination to the edge of our illumination, we get this nice soft gradation, controlled of course by those two penumbra angle settings.

We can even see this Falloff captured in our cone shape, so a very nice change to the Spotlight effect. If we just go back into our Light Editor, there's one more control that we just want to make mention of. We've already seen the Affect Diffuse and Affect Specular settings on all the light types, but here we have a new one: Area Specular. This allows us to make a change to really how the specular reflections from our spotlight behave. By default, with this setting disabled, we will get specular reflections that are identical to our Omni Light, that is, they are specular reflections emanating from a single point in space.

But if we need a more accurate realistic representation of the specular reflections from our spotlight, we can put a check in this box and that is exactly what we will get. As we see then, the spotlight affords lots of control over how it will interact with our environment. It is maybe a tool that we will use in more specialized situations, but definitely a welcome addition to our lighting arsenal. We do of course have one more artificial light type that we want to make an examination of, so in our next video we're going to take a look at the V-Ray IES Light.

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