Zoo Tycoon 2 Designing Centre (ZTDC for short) is one of the most famous Zoo Tycoon 2 forums in the community and the only one catered solely to designing. It opened in December 2005 and was founded by Penguinman as a resource to many designers around the community, with help from Mika, ShenTirag, and Eric (catc).
It contains many helpful tutorials and is well known for its, "So you want to be a designer?" topic. It has help topics for all methods from skinning to rigging for designing and is updated with new tutorials frequently. It also has some exclusive downloads.
The site's activity remained steady for five years before rapidly decreasing as many of it's original designers left the community. After administrators Nemo and Manu went inactive in 2010 it died off and was overtaken by guests looking for downloads and eventually spammers until control was passed to John (JVM) in 2014 and it was merged with Zoo Tycoon Hideout's downloads database. As of January 2015, it is one of the few Zoo Tycoon focused fansites still open.
The skinning collage is a game where designers face off to see who can make the best skin for the object in the description. All the participants skins are combined to form a new object or animal. It was founded by Mika, however, it is now being run by Nemo. The site also has many other contests. As of 2014, the site is considering opening new contests if there is interest.
Most of ZTDC's original downloads, which remain at the site, include Contest Winners and the Skinning Collage. It is also in the process of inheriting the combined download databases of Zoo Tycoon Volcano, Zoo Tycoon Hideout, Zoo Kingdom and Caldera Unlimited.