Sparkling Grape Juice Glass – Modeling and Rendering

Move the glass image so that it is centered and that it sits on the baseline. I set Z to –20 so that it sits behind the grid and then Y to 6.804.

If you loose the your image plane settings you can get them back in two ways. Select it until the image plane’s border turns green and the open the Channel Box.

It should look like this . . .

Move the glass image so that it is centered and that it sits on the baseline. I set Translate Z to –20 so that it sits behind the grid, Translate X to -0.201 and then Translate Y to 6.808. NOTE: Yours might be different.

Select the image, when selected the image plane’s border turns green and then open the Channel Box.

It should look like this . . .

ss.

It should look something like this. Now we have to attach curves. Select all curves and choose Curves > Attach Curves. Make sure you uncheck Keep Originals and check Insert Knots in the Attach Curve option box. Then delete the curve history. Select curve, Edit > Delete by Type > Histo

Using the Curve Point Tool, slide the point on the curve to determine how much ‘sparkling apple juice’ is in the glass and then detach curve. To do this, Right Click on the curve that need adjusting and choose Curve Point. This will separate the curve into 2 parts. Then choose Curves > Detach Curve and then delete the extra outer curve.

Adjust the vertices to simulate the surface tension and create a meniscus.

For liquid standing in a container, a meniscus forms. It can be convex or concave. A concave meniscus indicated that the molecules of the liquid have a stronger attraction to the material of the container (adhesion) than to each other (cohesion). A convex meniscus indicates the molecules have a stronger attraction to each other than to the material of the contai

ner.

Select the 2 curves that make up the ‘juice’, top and side. and choose Curves > Attach Curves. Make sure you uncheck Keep Originals and check Insert Knots in the Attach Curve option box. Then delete the curve history. Select curve, Edit > Delete by Type > History.

Now revolve the ‘juice’. Switch to x-ray mode, it should look like th

is.

These are the two pieces of revolved geometry. Assign a new material to the glass, which offers secularity attributes, Right-Click on the material and choose Assign New Material. Select aiStandardSurface. The glass should change color slightl

y.

Image Based Lighting:

Add a Skydome Light.

Talk about indirect lighting. NOTES!

In our case, the main light source is in the ceiling. Look at the top your hand, why is the bottom of your hand not completely in the shadows?

Reflecting Light is a transverse, electromagnetic wave that can be seen by humans.

The photon is the basic "unit" of light. Any light that you see is made up of a collection of one or more photons propagating through space as electromagnetic waves. In total darkness, our eyes are actually able to sense single photons, but generally what we see in our daily lives comes to us in the form of zillions of photons produced by light sources and reflected off objects. If you look around you right now, there is probably a light source in the room producing photons, and objects in the room that reflect those photons. Your eyes absorb some of the photons flowing through the room, and that is how you see.

For instance, a photon in the visible spectrum would contain an energy of approximately 4 X (10 to the power of -19) joules Thus, a perfectly efficient 100-watt light bulb would emit approximately 2.5 X (10 to the power of 20) photons per second.

Use Maya Default IBL (Image Based Lighting)

Navigate to the following location:

C:\Program Files\Autodesk\Maya2018\presets\Assets\IBL\

And Choose either:

Interior 1 – color

Interior 1 – Neutral

Interior 2 – color

Interior 2 – Neutral

Exterior 1 – color

Exterior 1 – Neutral

Exterior 2 – color

Exterior 2 – Neutral

OR Download a “Cool” HDRI file.

It should look something like this . . .

• Make a Table.
  

• Create new Camera, label it RENDER_ME & look through it.
  

• Add image based lighting - HDR Image, Hide in image in render.
  

• Turn off opaque for both the glass and the OJ
  

The juice is overlapping the glass just by a tad, so we are going to scale it down just a bit. First we are going to change the pivot point so it scales evenly. Select the revolved liquid geometry and choose Modify > Center Pivot. We also have to delete the history on the geometry so that the old curve does not control it anymore. Select the geometry, Edit > Delete by Type > History. Now while it is still selected, uniformly scale it to 0.99 units in Scale X, Y, & Z.