饾憴饾憭饾懀饾憭饾憴饾惗饾憸饾憿饾憶饾憽=0 is allowed, except for block-compressed formats, and means that a file contains only the base level and consumers, particularly loaders, should generate other levels if needed.
KTX specification, Section 3.7
So according to this, KtxUnity should ensure that mipmaps are generated for those types of ktx files.
KTX specification, Section 3.7
So according to this, KtxUnity should ensure that mipmaps are generated for those types of ktx files.