I need some information about copyright...
In my animation I need an image of Lucifer and I remembered the beautiful images of Gustave Dorè...
Can I use those images freely or I need some license?
Gustave Doré died in 1883. Most countries have copyright laws that extending a certain amount of years after artist death. 50-100 years is common. 70 years after artists death in France where Doré lived.
So Gustav Dorés art is now in public domain so feel free to use them as you wish.