Rendering in SketchUp



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Rendering in SketchUp From Modeling to Presentation for Architecture, Landscape Architecture and Interior Design ( PDFDrive )

219
Chapter 14: Organizing the Model
T
he layering system outlined in this chapter will allow you to create detailed, component-
rich models. Using simple layer conventions will help you maintain SketchUp perfor-
mance. Even if you are new to SketchUp, you should learn to apply this method. 
Using layers is essential when you’re modeling with vegetation components (Fig. 14.1). 
Plant components are the source of most performance issues. By placing vegetation on layers, 
you help maintain function. If you need a refresher on how to use the tools referenced here, 
refer to Chapter 12.
SketchUp relies heavily on the computer’s graphics video card and CPU to display your 
model. Rotating, zooming, and panning when good amounts of model detail are visible 
causes the video card and CPU to work much harder, causing SketchUp to slow down. Plac-
ing components and objects on layers, and then turning layers on and off, as needed, allows 
some objects to be hidden, requiring less of the computer’s resources and thus maintaining 
performance. 
Similarly, being able to turn layers off and effectively hide details and components makes it 
easier to compose and stage scenes for rendering.
Organizing 
the Model
Chapter
14


220
Part 3: Modeling Detail
Fig. 14.1: 
All of the shrubs in this SketchUp model are placed on layers.
What Is a Large Model?
A large model is any model that experiences performance problems and slowdowns due to 
the amount of geometry present. SketchUp has thresholds, measured in faces, of how much 
geometry it can easily display and still function. To find the Face value, select Window 
F
Model Info menu under Statistics (Fig. 14.2). The total number of faces in the model is listed 
to the right of the Face value line. Make sure the Show Nested Components box at the top is 
checked to ensure the Face tally is accurate.
threshold
Chapter 4 talks about how SketchUp is affected by processor and video cards. The better the 
processor and video card, the better SketchUp can handle large. The threshold for SketchUp 8 
using a recommended computer is around three to five million faces. Beyond that, the model 
can become unresponsive, even hard to open. This means, even if you are using layers, you 
should try not to exceed that number. With some exceptions, models achieving such large 
sizes are those using substantial quantities of three-dimensional vegetation. 



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