well your problem here is that right here {invulnerable:1b,Motive:pigscene} you've made your painting indestructable and will always be the pig scene. is the image a retextured pig scene painting and if so I assume that you have this pack installed double check that you haven't messed up the texture files. this texture should be inside the texture folder and in the painting folder not entity (which a lot of people make that mistake) and the texture file needs to be named pigscene. if that isn't your problem I don't know what is. also why do you need a command to place paintings lol