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[Portal 2] item_paint_power_pickup is a point entity available in Portal 2. This entity is in the FGD, but not code. It was most likely related to weapon_paintgun. Because it was removed, its exact functionality isn't known, although it likely would have behaved like the paint cans in Tag: The Power Of Paint, enabling the use of different paint types when picked up. When placed in Hammer, the entity appears as a health kit from Half-Life 2, and includes a "Paint Type" keyvalue, with a description labeling it as "the paint power of the pickup".