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For specifications on creating helmet assets, and their style, see the Helmet Specifications

Helmets can have more varied proportions than weapons, where important game play functionality is dependent on the weapons visuals. These just have to fit correctly over the head of the faction and class they are made for (must have eye holes that match with the characters eyes). However they shouldn't be so large that they clip through doorways and interfere with the players swing animations. 

Adding a helmet

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