Export named flags property with GDScript
The Texture resource has a "Flags" property in which you can select multiple elements in a list. There's no current way to export such a property via GDScript.
I suggest to expand in the current flags property format:
# This is the current format for flags, like the CanvasItem's Light Mask property:
export(int, FLAGS) var current_flags
# Suggested format for named flags:
export(int, FLAGS, "Name 1", "Name 2", "And so on") var named_flags
It should be relatively easy to add this, just a careful change in the GDScript parser to accept PROPERTY_HINT_FLAGS
near the place where it parses the PROPERTY_HINT_ALL_FLAGS
.