This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

n. a person who makes models, especially from a plastic medium such as clay

n. a person who models the behaviour of a physical system, especially by using a computer model

n. a computer program that simulates a physical system

n. a computer program that generates a three-dimensional representation of an object or system

n. One who models; hence, a worker in plastic art.

n. One who models; especially, one who forms models or figures in clay, wax, or plaster.

n. a person who creates models

"I don't know how the modeler is coded, so I wonder whether this is a quirk in the modeler or an exception to the rule."

modeller   

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