dimanche 25 octobre 2009

making eyeballs and building the materials in maya

maya tutorials eyeballs eye material modeling
In this tutorial, I am going to explain how to make eyeballs (eyes),
and how to set up their materials.

maya tutorials eyeballs eye material modeling Outline
maya tutorials eyeballs eye material modeling
The above figure is rendering only of an eyeball.
Rendering was executed with MayaSoftware with Raytracing on.

It is necessary to note the contrast to show the eyeball vividly.
I made a strong contrast in a bright part of the reflection of the cornea
and a black part of the pupil.

I think it is not necessary to make complete anatomy model.
But I think that you should reproduce the structure of the reality to some degree.

reference page of anatomy structure of eyeball



I explain a simple method in this chapter,
and I explain an advanced method that has of generality in the following chapter.


maya tutorials eyeballs eye material modeling modeling an eyeball
maya tutorials eyeballs eye material modeling

maya tutorials eyeballs eye material modeling
I did modeling separately for three parts of
a cornea, an iris and pupil, a sclera (the white of the eye)

I made the cornea and the sclera with the polygon sphere,
and I made the iris and pupil with NURBS.


maya tutorials eyeballs eye material modeling building the material of the cornea
maya tutorials eyeballs eye material modeling
The above is a rendering image only of the cornea.

It is a completely transparent material.
It has the highlight of Specular and two reflections of Reflected Color.

I named the reflections Reflection1 and Reflection2.

maya tutorials eyeballs eye material modeling

Assign a Blinn material to the cornea.
Set maximum value to the Transparency .
Set high value to the Specular and Reflectivity

Connect a Env Sphere of Environment Texture to the Reflected Color,
and connect a Ramp Texture (the below) to the Env Sphere.

maya tutorials eyeballs eye material modeling

A Ramp Texture was connected to the Env Sphere.
This is the Reflection1.
Select Box Ramp of the Ramp Texture, it will be square shape.
Adjust the place of the Reflection1 with the place2DTexture.

Connect a File Texture to the Color Offset of the Ramp Texture.
Set a photograph image of reflection to the File Texture.
This is the Reflection2.
Adjust the place of the Reflection2 with the place2DTexture.

maya tutorials eyeballs eye material modeling
The Connection Graph of the material of the cornea is shown
in the above figure.

You can make the Reflection1 and the Reflection2 as one picture file
with Photoshop.

In this example, it was divided into two like this.
It is because you can easily adjust the position of
the reflections individually with the place2DTextures.

maya tutorials eyeballs eye material modeling building the material of the iris and pupil
maya tutorials eyeballs eye material modeling
Assign a Blinn (or Rambert) material to the iris and pupil.
Set 0 to the Specular, it will have no highlight.
Connect a File Texture to the Color.
Set a image of an iris and pupil like the above to the File Texture.

maya tutorials eyeballs eye material modeling building the material of the sclera (the white of the eye)
maya tutorials eyeballs eye material modeling
Assign a Blinn material to the sclera.
Connect a Env Sphere of Environment Texture to the Reflected Color.
Set a photograph image of reflection to the File Texture.

maya tutorials eyeballs eye material modeling
Finished.

It continues to the explanation of a method that has of generality.
It is a method of changing the size of the iris and pupil easily.

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