= Alpha 21 =

Development started by ​Wildfire Games on April 2^nd^ 2016 (r17966).[[BR]]

The following list highlights the most important changes (more noticeable ones first):[[BR]]

== Gameplay & Balancing ==
r17974 owning multiple wonders gives multiple population boni (#3522 #3792)[[BR]]
r18021 technologies can be researched on captured buildings[[BR]]
r17999 defense tower techs don't affect wall-turrets anymore[[BR]]
r17970 reduce wall-tower range from 88m to 72m, increase minimum distance from 3m to 12m[[BR]]
r18008 corrals: Britons, Gauls and Iberians produce pigs, Carthaginians, Mauryans and Ptolemians produce goats[[BR]]
r18004 dropsites shared by default[[BR]]
r18007 allow sharing/unsharing multiple dropsites simultaneously[[BR]]

== User Interface ==
r18014 improve selection ring of animals (#3786)[[BR]]

== Petra AI ==
r17971 use corrals with low starting resources[[BR]]

== Engine ==
r17975 cinematic paths: interpolate camera rotation[[BR]]

== Performance Optimizations ==
r18011 slight improvement of flood-fill algorithm of the hierarchical pathfinder[[BR]]