The Community Upgrade Project is an initiative to bring all the content of ArmA 2
[+ OA and DLCs] from BI into ArmA 3, upgraded to the ArmA 3 feature set.

Its goal is to provide those assets to the community as a mod ready to use in the game. Cooperative and coordinated effort to get a coherent port of ArmA 2 content
[+ OA and DLCs] from BI to ArmA 3 standards. Release of the content in a coherent way Content 
This thread focuses on CUP Terrains. For the other projects, please visit this thread or our website. Please report bugs at our bug tracker - bug reports in the forum tend to get overseen.
 
CUP Terrains
 
CUP Terrains, the successor of “A3MP†and “All in ArmA – Terrain Pack (AiA TP)â€,  builds upon the work done by kju for AiA TP and brings all of BI’s iconic terrains to ArmA 3 as well as support for all the amazing 3rd-party terrains created by the community. CUP Terrains maintains full backwards compatibility to A3MP and AiA TP – no need to adjust any missions or maps.
CUP Terrains is modular, so there are different versions available: CUP Terrains – Complete: featuring everything, all the data and the BI terrains. Not available for download on platforms with automatic dependency support such as Steam Workshop or PlayWithSIX. CUP Terrains – Core: featuring only the data necessary for the terrains, but none terrain itself. Useful for those who only want to use CUP Terrains with 3rd-party terrains. But beware: some 3rd-party maps might be dependent on BI terrains. CUP Terrains – Maps: featuring only the maps created by BI – needs CUP Terrains Core to work. If you only want a part of the terrains featured here, just delete the respective pbo-files of the maps you don’t want. But beware: there might be interdependencies between terrains. Maps included in “CUP Terrains – Complete†and “CUP Terrains – Maps†are: Rahmadi Sahrani Southern Sahrani United Sahrani Porto Utes Chernarus Chernarus Summer Desert Takistan Zargabad Shapur Proving Grounds Bukovina Bystrica Takistan Mountains   All download links are available on the CUP download page on our website.   Further information are available on the detailed CUP Terrains page on our website.