Texturing a Tire – Photoshop + Maya Creating the texture in ...

Texturing a Tire – Photoshop + Maya
Creating the texture in Photoshop, we
will begin with the bump map of the tire.
Create a new file 1024X1024 and draw
four black rectangles
In a new layer create another black
rectangle, transform and distort to get
this shape – then apply a gradient map of
transparent to opaque, from left to right
respectively (in the blending options of
the layer).
Move the shape into position and
duplicate until you get this (you can use
actions in Photoshop, or define a
pattern). Duplicate the layer and flip
horizontally, place on the opposite side.

Create this image from 3 rectangles.
Repeat the tiling process as previously
described; keep more distance in this
case. You may use a gradient map here
as well to gradually change the height of
the bump map.
Create a‘Y’ shape from 3 rectangles (or
draw it) and complete 2 more rows; put
another vertical black rectangle in
between them.
Make sure that the image you have
created has a gap of equal size either
side of the pattern. When assigned to the
surface, this area will become the ‘side’
of the tire, therefore it will need to match
the model in terms of scale.

Assign the bump map to the surface,
making sure that the pattern of the
texture does not stretch around the sides
of the tire. This image is a render with
bump map only.
The tire is still very smooth; we’ll create a
base bump. On a new layer, render
clouds with shades of grey, then use
some filters to create a uniform bump
(texture>texturizer – burlap with very low
relief will do)
Put this layer under the main bump and
change the main bump layer blend mode
to Multiply.
Duplicate the main bump layer and use
distort>ocean ripple on the new layer
with a low value; change the blend mode
of the top layer to multiply.
before
after

Using the bump base only, insert text on
the side (the direction will depend on
your surface direction and how you laid
the textures in Maya)
Make the text white – this will emboss it
from the tire. Map this one to the default
color for the bump.
Embossed text
And now we’ll address the color. Render
clouds in a new layer. dark greens and
browns will work here. Put the clouds
layer on top of the bump layers and
switch the blending to soft light duplicate
the layer 2-3 times to get a darker result
(I brightened this image for clarity)

Use the same clouds to create the color
in the text area
Color and bump map only. With no
specularity and diffusion maps, the tire
looks uniformly shiny and diffuses the
light uniformly as well. We need to
address these problems.

We can create the specularity map from
the bump map – reduce contrast and
narrow the levels – we do not want to
have a great range of specular here.
Use this map for specular roll off,
eccentricity and diffuse.

The hypershade graph
The different maps are now connected to
the appropriate attributes, you now need to
adjust by changing the alpha gain and color
gain of the images to get the right result

All maps laid on the tire – ray traced render