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Instances#548671
<cat>Hammer.Advanced</cat>⤶
<title>Instances</title>⤶
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# What are instances?⤶
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Instances are slightly different than prefabs and have their own merits. It's worth noting that it too can contain both models, geometry, and/or entities. ⤶
The biggest difference is that it cannot be referenced from any other map but the one it is created within. ⤶
It is local to the current VMAP.⤶
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One of the benefits to instances is rendering. Much like models, where if the same model is repeated over and over again it will be batched up into a single rendering pass, instances are handled the same way. Geometric detail that is instanced and repeated is batched together for rendering purposes.⤶
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Another benefit is that when editing instances the changes can be seen immediately to all the surrounding same instances. If a house is an instance and a window is added that change is instantly duplicated to all the other instances.⤶
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#Creating Instances⤶
1. Select a number of objects and/or meshes⤶
2. Right click to bring up the context menu and `Selected Objects` -> `Create Instance`⤶
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You could press the hotkey <key>CTRL</key> + <key>Shift</key> + <key>G</key> to quickly create an Instance.⤶
<upload src="b0065/8dafa3f7a21d3a7.png" size="442316" name="creatinginstances.png" />⤶
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##Editing Instances⤶
**Double click** on an **instance** to edit it. Any changes to the instance will be reflected live to all other instances inside the map.⤶
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##Collapsing Instances⤶
Right click on an instance `Selected Objects` -> `Collapse Instances`. ⤶
Similar to collapsing a prefab the collapsed instance will leave behind all the individual objects and meshes.⤶
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