I made this rock model in Blender, and now I want to import it into UE4. When I try to bake the normal map, I get an empty purple map and the message "baking map saved to internal image, save it externally or pack it".
I'm having the same problem when I try to bake other maps as well. Does anyone know How can I solve this problem ? I want to add more details to my material, but with this problem I can't do anything.