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Creating a mesh light

From: V-Ray 2.0 for Maya Essential Training

Video: Creating a mesh light

Although the tools we previously added to our Maya Rendering shelf give us access to the already stated three flavors of the V-Ray light -- that is, the dome light option, the rectangular option, and the spherical Light -- there is actually a fourth option available to us. What we're going to look at in this video is how we can turn geometry in our scenes into a direct light source; a direct light source that has all of the light controls available, in the other V-Ray light types. To do this, we just need to come to, first of all, our Layer Editor. Because we have a layer, we need to make certain it is visible.

Creating a mesh light

Although the tools we previously added to our Maya Rendering shelf give us access to the already stated three flavors of the V-Ray light -- that is, the dome light option, the rectangular option, and the spherical Light -- there is actually a fourth option available to us. What we're going to look at in this video is how we can turn geometry in our scenes into a direct light source; a direct light source that has all of the light controls available, in the other V-Ray light types. To do this, we just need to come to, first of all, our Layer Editor. Because we have a layer, we need to make certain it is visible.

That is this Cylinder_Mesh_Light, and if we just click on that, we see a piece of geometry appear in our scene. And if we just select that geometry, you can see, coming back to the Attribute Editor, that this is just a simple cylinder object. So we have it named; it is already set as Cylinder_Mesh_Light. We can see we have no light controls available. To turn the piece of geometry into, essentially, a V-Ray light, we just want to come up to the Create menu, come all the way down to this V-Ray section, and the option we want to choose is this Turn selection into light. So if we just left mouse click, make certain that our geometry is selected, and if we just come across, here you can see we now have this vrayLightMeshProperties node, and as you can see, here we have all of the controls that have been available that we've been working with for our other V-Ray light types.

To demonstrate to you that this is indeed a direct light source, we're just going to come up the Window menu; let's pull up over Outliner. We'll grab our key light, and disable that, and we'll take a render. Let's just middle mouse click to select our rendering camera, and we'll take a render, and you'll see what we have is a piece of geometry acting as a light source in the scene. And of course, all of the same options, all of the same features that are available on the other V-Ray light types will be available on this mesh light. In fact, let's just demonstrate to you. Let's just get rid off our Outliner, let's select our piece of geometry; grab our Move tool.

Let's pull it forward in the scene. In fact, let's grab our Scale tool, and show you that the same requirements regarding the size to intensity relationship still apply in terms of the V-Ray light. Let's just grab this, and we'll move it up a little bit in the scene. Let's take another render, and you very clearly see a completely different level of illumination is what we're now receiving. And of course, we can see the light source in the scene. All of those same controls regarding hiding lights, the invisible option; all will work with this V-Ray mesh light option.

Now here we, of course, have used a very simple piece of geometry, but you can imagine that with some really complicated pieces of geometry in the scene, that we could get some interesting lighting effects going for ourselves. Clearly, the V-Ray light is an extremely versatile and powerful light type, and I'm certain that this mesh light option is something that we'll be able to find lots and lots of uses for in our lighting setups.

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This video is part of

Image for V-Ray 2.0 for Maya Essential Training
V-Ray 2.0 for Maya Essential Training

54 video lessons · 2244 viewers

Brian Bradley
Author

 
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  1. 4m 28s
    1. Welcome
      59s
    2. What you should know before watching this course
      51s
    3. Exercise files
      40s
    4. Workflow recommendation
      1m 58s
  2. 11m 32s
    1. Installing V-Ray
      4m 25s
    2. Setting up V-Ray
      3m 14s
    3. Locating V-Ray's tools and features
      3m 53s
  3. 24m 41s
    1. Image sampling explained
      3m 19s
    2. Understanding subdivs
      3m 49s
    3. Using the DMC Sampler
      6m 54s
    4. Overview of color mapping
      4m 45s
    5. Understanding the color-mapping modes
      5m 54s
  4. 27m 55s
    1. Dealing with lighting problems
      9m 26s
    2. Adding a spherical fill light
      8m 50s
    3. Creating a mesh light
      2m 43s
    4. Creating a skylight effect
      3m 18s
    5. Working with the dome light
      3m 38s
  5. 44m 25s
    1. Global illumination (GI) explained
      3m 55s
    2. Understanding primary and secondary bounces
      3m 34s
    3. How irradiance mapping works
      5m 30s
    4. Using irradiance mapping, part 1
      4m 35s
    5. Using irradiance mapping, part 2
      5m 44s
    6. How light cache works
      3m 48s
    7. Using light cache
      7m 58s
    8. Understanding brute force GI
      2m 18s
    9. Using brute force GI
      7m 3s
  6. 40m 3s
    1. Introduction to V-Ray-specific materials
      2m 22s
    2. Creating diffuse color
      8m 31s
    3. Making reflective materials
      5m 40s
    4. Blurring reflections
      8m 31s
    5. Making clear and colored glass
      8m 49s
    6. Creating a translucency effect
      6m 10s
  7. 24m 15s
    1. Introduction to image sampling
      2m 56s
    2. Using the Fixed-Rate sampler
      5m 57s
    3. How to use the Adaptive DMC sampler
      5m 21s
    4. Working with the Adaptive Subdivision sampler
      7m 7s
    5. Comparing image-sampling renders
      2m 54s
  8. 17m 23s
    1. The physical workflow explained
      2m 37s
    2. Working with VRaySun and VRaySky
      7m 39s
    3. Controlling the VRayPhysicalCamera
      7m 7s
  9. 45m 0s
    1. Depth of field: VRayPhysicalCamera
      5m 45s
    2. Depth of field: perspective viewport
      5m 49s
    3. Creating a motion blur effect
      9m 30s
    4. Generating caustic effects
      7m 51s
    5. Using VRayFur
      6m 2s
    6. Setting up render-time displacement effects
      10m 3s
  10. 34m 17s
    1. Render elements workflow
      6m 47s
    2. Preparing to composite
      2m 22s
    3. Compositing V-Ray elements
      7m 8s
    4. Putting extra elements to work
      6m 20s
    5. Post-lighting a scene
      11m 40s
  11. 11m 47s
    1. Overview of V-Ray RT
      5m 27s
    2. Demonstrating the RT workflow
      6m 20s
  12. 1m 8s
    1. What's next?
      1m 8s

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