https://developer.apple.com/documentation/metal/setting_resource_storage_modes/choosing_a_resource_storage_mode_in_macos
https://developer.apple.com/documentation/metal/setting_resource_storage_modes/choosing_a_resource_storage_mode_in_ios_and_tvos
GMetalForceIOSTexturesShared
StorageModeShared
StorageModePrivate
rt用private
可以硬件开启lossless compression
xcode可以查看
可以降低带宽和footprint
你要是不改 ue就是 默认都是shared 不知道他是出于什么考虑
还有metal fp32那件事。。。真是尴尬
ue /metal texture memory management
原文：https://www.cnblogs.com/minggoddess/p/14279531.html