Hi Levina, Yes, they are, the tree is 12 exposures and the urn thing is about 6, I was inspired by a photographer named Pep Ventosa.
His work is amazing, the trick to this is layering the images together while decreasing the transparency of the layers has you work through them.
I kept my layers to a manageable amount while trying this technique, I think Pep uses hundreds of layers and it is extremely painstaking to go through each layer individually.