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In page Production logo:

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By 2007, almost all production logos have become produced (or edited) on computers, and have reached a level of sophistication equivalent to that of the best special effects. There are some exceptions; the Mutant Enemy "grr, argh" ID was shot using a camcorder and paper models, and the producers of South Park even recycled footage from an old Braniff Airlines ad for their "vanity" logo. Producer Chuck Lorre uses his production card to post a long essay or observation in small type which changes each week and requires pausing with a recording device to read.[4]