Unity Script Reference:
Legacy Documentation: Version 4.3.0
BlackBerryBuildSubtarget
Description

Texture Compression Types.

ETC1 can be used for universal BAR files or PVRTC and ATC can be used for targeting specific hardware.
Variables
Generic Don't override texture compression.
PVRTC PowerVR texture compression. Available on BlackBerry devices running PowerVR GPU's.
ATC ATI texture compression. Available on BlackBerry devices running Adreno GPU.
ETC ETC1 texture compression (or RGBA16 for textures with alpha), supported by all devices.