Who is eligible for Registration:

*Windows users who purchased online or through a reseller.
*Macintosh users who have purchased their version online and would like a free of charge license transfer to the Windows version (This license can be exchanged for a Macintosh version once ZBrush 3 is released for that platform.)

All other users:
*If you purchased a Macintosh version through a reseller please contact support@pixologic.com to upgrade. Please include your Name, Reseller, Address and Email Address at the time of purchase.
*If you ordered 2 or more copies of ZBrush at the time please contact support@pixologic.com to register for your download link. Please include your Name, Order ID, Address and Email Address at the time of purchase.
*If you have purchased multiple copies of ZBrush but did so one copy at a time please register for each order individually. Make sure to enter your Order ID for each order.

Registration form and instructions are available here.