I have problem with my icons, all works only with civ5 DX9 but not with civ5 DX10/11.
I'm sure that it is problem with DDS format. I use Paint.NET 3.3 and such dds settings:
What DDS format I have to use to see my icons also in civ5 DX10/11?
EDIT:
It looks that tech tree icons with cvi5 DX10/11 needs DDS without compression.
but zero compression is needed only for small (45) icons and with civ5 DX10/11
I don't know if it is paint.net dds compression bug or civ5 requirements.
I'm sure that it is problem with DDS format. I use Paint.NET 3.3 and such dds settings:

What DDS format I have to use to see my icons also in civ5 DX10/11?
EDIT:
It looks that tech tree icons with cvi5 DX10/11 needs DDS without compression.

but zero compression is needed only for small (45) icons and with civ5 DX10/11
I don't know if it is paint.net dds compression bug or civ5 requirements.