Advanced Light and Materials Properties and Effects ◾ 387
USING ANISOTROPY WITH MENTAL RAY TO CONTROL
THE TRANSPARENCY OF FROSTED GLASS
We will focus on one particular setting for the frosted glass on the double doors,
Anisotropy. Anisotropy is an attribute that can be set in the mia_material attribute box.
is controls highlights that run across the scene in multiple directions.
In Figure15.34, we see the Anisotropy settings for the mia_material that makes up the
frosted glass of our doors.
Figure15.35 shows a render resulting from an Anisotropy setting of 1, meaning that the
le-right and up-down values of the highlights are equal, or more precisely, that the high-
lights are even in all directions. us, the glass doors blur the white shelves behind them.
In Figure15.36, the setting is 10, creating a highlight that is not equal in all directions.
In particular, the top-down highlights are soer than the le-right highlights. e eect
is to undo some of the frosted eect of the glass, as the highlights do not blur the shelves
as much. You can think of it this way: In order for the horizontal shelves to be distorted
FIGURE 15.27 in glass settings.