
buftons may look cryptic, but they have a direct association 
with the objects represented in the interface. The fitst 
symbol of each parameter relates to the obJect In the 
foreground layer and the second symbol relates to the object 
in the background layer. 

Following this logic, Iet's look at our choice in the Y menu. 
The -+ (negative/positive) symbot is stating that the -
(negative) side (or in this case the bottom) of the foreground 
object (the book) will be aligued with the + (positive) side (or 
in this case, the top) of the background object (the table). So 
when you select either of these butions, always imagine that 
the foreground object is moving in relation to the 
background object. 

5. select the Y-(-+) (negative/positive) button 
the bottom of the book will align with the top of the table 
And finally, we also want the book to be centered along the 
depth of the table. Since Depth (or back and forth) is 
represented by Z in 3D we will set the Z menu to CENTER on 
the Align 8 Center requester: 
 
6.select the Z-CENTER button 
the book will be centered along the width of the table 

7.make sure the Sizing button is NOT checked and click 
OK or hit Return 
the book is now resting centered, on the top of the table 

Now the book is resting on top of the table with no 
mathematics necessary. Spend some time now 
experimenting with the ditferent settings to become famillar 
with the Align 8 Center tool. Ity to remember the meaning 
of the -+ and +- symbols in partlcular, they'll be extremely 
useful in future modeling sessions, 

 Scale 

Imagine that you are building a deck for your house with 2 
by 4 wooden boards. You're ready to fiil in the last 2 by 4 
slot but all you have is a 4 by 8 and two I by 4 boards. If 
you were talkmg to someone you might say "I need to make 
that 4 by 8 smaller" or " , need to make this I by 4 Iarger". To 
finish building the deck you would saw the 4 by 8 down to 
size or nail the I by 4's together. The piece of wood would 
appear to be larger or smaller but would it have actually 
changed size? 
his however you like, click OK, and then click OK on the main panel. 
There is now a Fractal null attached to our "CyanBlob" eftector. 

Tutorial #22 - usin the Points-to- urface-Efrectors lu in 
In Modeler, use the disk tool to create a ring of points, select the points, and then invoke the 
"Points_To_S_Efrs" plugin. A panel should appear with a number of fields showing: 
