I have a hand-painted picture in PNG format, the size is 60kb,
after import to UE4.15 it increased to 113kb,
^^! that’s ok, I can accept the double change, but~! @@||| After Packaging, I found it grew to 2.26MB with the extension name: .uexp .
Why it became so large? What caused this “40 times”? I just use it as texture image in ui widget, and I noticed in the detail page says the sourse file size is 2.3MB too.
Does UE4 can not ignore the pixel of transparent background? =_=?