A Unity ID allows you to buy and/or subscribe to Unity products and services, shop in the Asset Store and participate in the Unity community.
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We wrote up a Kickstarter tips epub - you can download it free at: http://ge.tt/990dZtD/v/0?c and if you want to see our scrappy use of a Unity...
I use Cinema4D 11.0 - I can't get the export helper to load - "Unknown Format" - I am new to all this so I might have done something wrong.