mimic the skin of an orange, you will add a bump map texture.
A bump map creates the illusion that the surface has bumps or other
types of surface relief. You will map the texture using the Create
Bar in Hypershade.
Bar is similar to the Create Render Node window
you have used already. It is built into Hypershade for
The Mayakist logo file
texture is a 2D texture, which wraps evenly around the surface.
Next, you create a 3D texture. A 3D texture is for making objects appear
to have been carved out of a solid substance, such as marble or
To create a bump texture within the Hypershade
- In the Create bar,
select Maya > 3D Textures.
For this bump effect,
you use a Brownian 3D texture. Experience
has shown that a Brownian texture is the best
texture for approximating the bumps on an orange skin. Becoming
skillful with textures is a matter of observation, experimentation,
- With the middle mouse button, drag the Brownian texture
(under 3D Textures) onto the Orange
material swatch in the Work Area tab
and release the mouse button.
- From the menu that appears, choose bump
Maya connects or applies Brownian to
the Orange material’s bump map attribute.
The pop-up menu shows
a list of common material attributes. Although you can map textures
to any material attribute, these are the most commonly mapped attributes.
By default, you can assign
only one texture per attribute. Attributes that already have an
assigned texture appear in italics. (For a discussion about assigning
multiple textures to an attribute, see
This drag-and-drop method
of applying a texture is essentially the same as clicking the map
icon next to a material’s attribute slider. Using Hypershade offers
a faster, more graphical alternative to using the Attribute
- Select Graph > Input and
Output Connections to view the node connections for the
new texture you created.
Also notice that bumps
from the bump map appear in the Orange material’s swatch. The Orange
material swatch is the same as the Material Sample that
appears in the Attribute Editor for the material
node. (The bumps also appear in a rendered image, but not in the
- Double-click the bump3d1 swatch (the
checkered cube) to display its attributes in the Attribute
This node is the link
between the texture and the material. It converts visual information,
such as the mottled Brownian pattern, into the appearance of surface
The most important attribute
in the bump3d1 node is Bump Depth, which controls the intensity
of the bumps.
- Change Bump Depth to 0.15. In the Orange
swatch or a rendered image, you’ll see that this diminishes the
bumps as compared to the default value 1.0.
If you select
Render > IPR Render Current Frame
a message appears: Please select the view you want to render
Either select the perspective view before choosing IPR
Render Current Frame
, or, in the Render
window, select IPR > Redo Previous
- In the Hypershade panel,
click the brownian1 texture swatch to reveal its attributes. Set
These values produce
a rendered image closer to real orange skin.
Our recommendation for
these values is based on experimentation. For Brownian and some
other textures, it’s usually faster to get desirable results by
experimenting with the settings rather than trying to understand
the definition of each attribute.