DXT1 problem when run ue4 package in Linux

Hi All,

While trying to run my package from ue4 in Linux ,I met with some problem about texture format.

According to the log, DXT1 texture is not supported. I have already changed all my DXT1 texture to other format. Anyway, the bug still exist. I assume it’s caused by DXT1s in Engine Content.

I don’t feel it’s the right way that I manually find all DXT1 in Engine Content and change them. Those texture are not even being used in my levels.

Is there a way I avoid to pack them, or forbid UE to use DXT1 format at all?