I have a collection of artwork licensed under CC BY-NC-SA. I want to include some code licensed under GPL. Can I include all of it under CC BY-NC-SA? If not, what should I use? The situation:
Software A enables greater use of pre-included artwork in Software B. I am modifying Software A to be able to use my artwork. Software A is licensed under GPLv3. Can I license my artwork + my modifications under CC BY-NC-SA, should I use GPL instead, or Should I license the artwork and modifications separately?