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# Factorio Runtime Docs Version 2.0.7

## NoiseExpression :: table

A fragment of a functional program used to generate coherent noise, probably for purposes related to terrain generation. These can only be meaningfully written/modified during the data load phase. More detailed information is found on the prototype docs.

#### Table fields

type | :: string | Names the type of the expression and determines what other fields are required.
Names the type of the expression and determines what other fields are required.