Author: Lee Lanier

Lee Lanier

Lee Lanier has worked in the motion picture industry since 1989, having spent hundreds of hours on live-action sets and thousands of hours working with high-end animation and compositing software. He’s created visual effects for Walt Disney Studios and served as a senior animator in the modeling and lighting departments at PDI/DreamWorks on Antz and Shrek. In addition to having taught at the Academy of Art University and Gnomon School of Visual Effects, Lee has written seven books on visual effects and digital compositing, has recorded tutorials for lynda.com and The Foundry, and is a member of the Visual Effects Society.

Posts by Lee Lanier:

FIG 4.1 The Translate X channel of a polygon sphere indicates an expression with purple coloring.

Controlling nParticles with Expressions

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An Introduction to Expressions Expressions are special text instructions that you can apply to node channels. Nodes are discrete units of a hierarchy that store information (such as a transformation matrix, geometry attributes, and so on), while channels are keyable attributes of a node, such as Translate X, Visibility, and so on. The instructions can…

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