Graphics Programs Reference
In-Depth Information
Prepare the Model for Printing
When printing a model on a 3-D printer, you have to ensure that your object is in print-ready condition. This
means checking to see that the object meets certain physical requirements. We will take a look at each here.
“Watertightness”
An object prepared for printing must be a closed surface as if it were watertight. That means there can be
no holes in the 3-D model. For example, Figure 11-18 shows an arm with gloves on—the gloves have no
thickness to them—they are only a single layer of polygons. Because of this, they will confuse the machine
and will not print. We then see the same gloves with a thickness built in, in the form of an inner and outer
shell—they are now objects with a volume that can be printed in the real world.
Figure 11-18: These gloves will not print because they are not solid volumes. The same gloves are correc-
ted with a wall thickness, and this makes them real volumes that can be printed. Otherwise, a wall of poly-
gons has no real-world thickness that can be replicated.
 
 
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