Revert "Format changes"

This reverts commit d7d6967e9b34cac908de8ad66208b7ea97cc3d21.
Revert "Revert "Format changes""

This reverts commit 7e291658fcde332d5cfd696f7d54ddc5bc677ff0.
Switch Texture2D format to UNSIGNED_SHORT_4_4_4_4