Global environment - Sketch
Description: Sketch

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### 3.4 Global environment

An optional global environment block provides a few ways to affect the entire scene. The block must appear as the last text in the `sketch` input file. It may include definitions, but note that previous definitions at the top level (not nested inside blocks) are also available.

Syntax:

         global { environment_settings }

The contents of environment_settings are discussed in the sections that follow.