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Setting opacity

From: 3ds Max 2011 Essential Training

Video: Setting opacity

One of the basic properties of a Material is Opacity. Basically, is the object Transparent or Opaque? You will see that by default the Opacity is 100, which means that the object that has this material is 100% Opaque. If I set the Opacity to 50%, then we can see through the object. It's semitransparent. And I can do a rendering of that by clicking on the Quick Render button here, so we can see through it.

Setting opacity

One of the basic properties of a Material is Opacity. Basically, is the object Transparent or Opaque? You will see that by default the Opacity is 100, which means that the object that has this material is 100% Opaque. If I set the Opacity to 50%, then we can see through the object. It's semitransparent. And I can do a rendering of that by clicking on the Quick Render button here, so we can see through it.

There's two things. Number one is, by default, Materials are not two-sided, so they are only one-sided, so we can't see the back faces of this object. So any of the polygons that are facing away from our current view are called out in the renderer. If I wanted to see those back faces, I need to enable the 2-sided option in the Material. So I will click 2-sided and Render that again, and now you can see the object is Transparent, and we are seeing the backside as well.

Now, this doesn't have any refraction to it, so it doesn't look like glass. So refraction is the bending of light through a transparent medium. And when light moves from air to glass, it actually bends, and when it moves back out from glass to air again, it bends again, and we get some visual distortion from that. This is not happening here, and it doesn't happen by default when we play with the Opacity. So if wanted refractions, we would have to do more than that.

We would have to actually put something into the Refraction Channel. I can do that now by scrolling down into the Maps rollout. I can open that up, and you will see Refraction, and I can drop a Map into that slot. So where it says None, I can click the button, and I get my Material Map browser up again. And what I want here is something called Raytrace. So I will double-click on that, and now you will see that my sample sphere is showing Refraction, or bending light.

And if I Render here again, it will take longer, but you are seeing a basic effect of Refraction. Now, it would take me a while to get this, so that it would look like something good. For example, ironically, I could increase the Opacity and maybe reduce the Refraction Amount. And that's looking better.

So I am actually getting a sort of tinted glass look to this. There's more to it than that and if you are really interested in doing photoreal rendering, you should probably take a look at Mental Ray, and we do have a course in Mental Ray Lighting and Rendering. This is just a basic intro course, so I am just showing you the essentials. That's how you work with Opacity and Refraction with the Standard Material.

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3ds Max 2011 Essential Training

150 video lessons · 14844 viewers

Aaron F. Ross
Author

 
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  1. 3m 19s
    1. Welcome
      57s
    2. Prerequisites
      1m 18s
    3. Using the exercise files
      1m 4s
  2. 7m 33s
    1. Using the Custom UI and Defaults Switcher
      1m 35s
    2. Setting local file paths to relative
      1m 27s
    3. Using project folders
      4m 31s
  3. 36m 35s
    1. Getting familiar with the interface
      4m 5s
    2. Touring the command panels
      1m 44s
    3. Creating primitives
      3m 5s
    4. Navigating the viewports
      3m 57s
    5. Using hotkeys
      3m 18s
    6. Choosing shading modes
      3m 6s
    7. Configuring the viewports
      3m 29s
    8. Transforming objects
      4m 32s
    9. Using the toolbars
      3m 33s
    10. Using the Modify panel
      5m 46s
  4. 36m 11s
    1. Surveying different modeling methods
      5m 18s
    2. Setting units
      5m 8s
    3. Setting home grid dimensions
      3m 37s
    4. Understanding the Level of Detail utility
      3m 34s
    5. Working with the Modifier Stack
      3m 51s
    6. Understanding dependencies
      5m 9s
    7. Collapsing the Modifier Stack
      4m 53s
    8. Working with sub-objects
      4m 41s
  5. 18m 32s
    1. Creating shapes
      5m 17s
    2. Creating lines
      2m 56s
    3. Converting a shape to an editable spline
      2m 20s
    4. Transforming editable spline sub-objects
      4m 20s
    5. Using different types of vertices
      3m 39s
  6. 35m 30s
    1. Lofting a vase
      3m 59s
    2. Setting loft parameters
      3m 49s
    3. Editing the path and shapes
      5m 18s
    4. Manipulating loft sub-objects
      3m 55s
    5. Adding a scale deformation
      5m 47s
    6. Adding a shell modifier
      3m 50s
    7. Smoothing polygon edges
      8m 52s
  7. 26m 20s
    1. Setting up the project and scene layout
      2m 34s
    2. Creating a backdrop profile line
      1m 19s
    3. Using Editable Spline Fillet
      1m 24s
    4. Extruding shapes
      2m 36s
    5. Creating text
      1m 21s
    6. Applying a bevel modifier
      3m 57s
    7. Choosing bevel parameters
      2m 33s
    8. Using Display All Triangle Edges
      1m 56s
    9. Adjusting spline interpolation
      2m 22s
    10. Deforming beveled objects
      1m 17s
    11. Exporting paths from Adobe Illustrator
      2m 39s
    12. Importing Illustrator paths to 3ds Max
      2m 22s
  8. 55m 55s
    1. Setting up the scene
      2m 8s
    2. Creating chamfer boxes
      4m 44s
    3. Smoothing edges
      1m 16s
    4. Using the Array tool
      5m 31s
    5. Grouping objects
      10m 18s
    6. Modeling lines
      11m 17s
    7. Using the Sweep Modifier
      3m 0s
    8. Soft-selecting sub-objects with Volume Select
      5m 40s
    9. Removing polygons with Delete Mesh
      2m 37s
    10. Clearing a sub-object selection with Mesh Select
      3m 37s
    11. Adding randomness with the Noise Modifier
      5m 47s
  9. 33m 2s
    1. Understanding subdivision surfaces
      2m 46s
    2. Creating a box and converting to editable poly format
      3m 54s
    3. Using the Symmetry Modifier
      1m 44s
    4. Working with TurboSmooth
      3m 3s
    5. Extruding polygons
      1m 54s
    6. Editing edge loops
      8m 15s
    7. Shaping the model
      4m 57s
    8. Baking subdivisions
      3m 45s
    9. Optimizing polygon Level of Detail
      2m 44s
  10. 38m 45s
    1. Understanding the graphite tools within Editable Poly
      2m 40s
    2. Using the Graphite Ribbon interface
      3m 26s
    3. Using traditional editable poly tools within Graphite
      11m 30s
    4. Adjusting detail with Remove and Cut
      4m 44s
    5. Using SwitfLoop
      2m 46s
    6. Constraining sub-object transforms
      2m 23s
    7. Attaching polygon meshes to a single object
      5m 33s
    8. Bridging parts of a mesh
      5m 43s
  11. 25m 24s
    1. Understanding NURBS
      2m 35s
    2. Creating NURBS curves
      7m 27s
    3. Creating a U-loft surface
      5m 52s
    4. Editing curves and surfaces
      3m 9s
    5. Setting surface approximation
      6m 21s
  12. 1h 0m
    1. Using the Material Editor
      7m 8s
    2. Choosing a material type
      3m 3s
    3. Choosing a shader type
      2m 12s
    4. Adjusting specular parameters
      3m 6s
    5. Setting opacity
      3m 5s
    6. Understanding procedural Maps and bitmaps
      4m 11s
    7. Using bitmaps
      5m 21s
    8. Navigating shader trees
      2m 27s
    9. Tracking scene assets
      4m 40s
    10. Creating simple UVW mapping
      7m 52s
    11. Adding reflections with a Raytrace map
      4m 32s
    12. Creating an environment
      5m 27s
    13. Mapping a bump channel
      7m 13s
  13. 27m 4s
    1. Creating cameras
      4m 1s
    2. Understanding target and free cameras
      4m 39s
    3. Using Camera Pan, Truck, and Dolly
      4m 8s
    4. Adjusting the field of view
      4m 59s
    5. Understanding aspect ratio
      2m 6s
    6. Showing safe frames
      3m 12s
    7. Choosing render output size
      3m 59s
  14. 43m 36s
    1. Understanding CG lighting
      5m 56s
    2. Understanding standard and photometric lights
      1m 48s
    3. Creating a target spotlight
      2m 3s
    4. Enabling viewport hardware shading
      2m 10s
    5. Previewing renderings with ActiveShade
      3m 6s
    6. Adjusting intensity and color
      2m 27s
    7. Controlling contrast and highlights
      2m 52s
    8. Setting spotlight hotspot and falloff radius
      4m 59s
    9. Choosing a shadow type
      3m 56s
    10. Optimizing shadow maps
      5m 46s
    11. Using area shadows
      3m 57s
    12. Creating omni lights
      4m 36s
  15. 43m 33s
    1. Understanding keyframes
      1m 41s
    2. Setting time configuration
      3m 48s
    3. Choosing set key filters
      1m 27s
    4. Using Set Key mode
      2m 39s
    5. Editing keyframes in the Timeline
      2m 43s
    6. Using Auto Key mode
      5m 44s
    7. Creating animation in passes
      2m 40s
    8. Animating modifier parameters
      3m 53s
    9. Working in the dope sheet
      7m 47s
    10. Editing function curves
      5m 28s
    11. Looping animation
      5m 43s
  16. 43m 54s
    1. Understanding hierarchies
      3m 16s
    2. Understanding reference coordinate systems
      5m 51s
    3. Editing pivot points
      4m 40s
    4. Linking objects
      3m 20s
    5. Using the Schematic view
      1m 59s
    6. Preventing problems with scale
      7m 50s
    7. Animating a hierarchy
      10m 11s
    8. Fine-tuning the animation
      6m 47s
  17. 20m 53s
    1. Understanding controllers
      3m 55s
    2. Applying path constraints
      4m 55s
    3. Assigning a link constraint
      2m 27s
    4. Using the Motion panel
      2m 48s
    5. Animating constrained objects
      6m 48s
  18. 28m 29s
    1. Understanding particle systems
      2m 24s
    2. Emitting particles from an object with PArray
      2m 18s
    3. Adjusting particle parameters
      5m 33s
    4. Binding particles to a gravitational force
      2m 51s
    5. Colliding particles with a POmniFlector
      6m 4s
    6. Creating a particle material
      3m 23s
    7. Mapping opacity with a gradient
      2m 1s
    8. Assigning a material ID G-Buffer channel
      46s
    9. Creating a lens effect glow
      3m 9s
  19. 18m 50s
    1. Understanding image sequences
      5m 40s
    2. Setting render options
      7m 53s
    3. Compressing an image sequence to a movie
      5m 17s
  20. 27s
    1. Goodbye
      27s

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