cutting out and transforming the "ufo" pic (1) and using the pen tools to add the "web" (2), (3), (4)
step 2 of 4
adding the transformed ufo pic inner shadow ( layer style > inner shadow) (1), and then also adding bevel and ambross plus outer glow to the horizontal web (2) and not to forget giving the vertical web inner bevel (3)
step 3 of 4
using pen tool to create the "floor" and fill the shape with grey (1), duplicating the shape and fill the duplication with darker grey and the origin shape layer was move a bit down after that just merge the layers (2), finally masking the source pic and blend it with soft light blending (3)
step 4 of 4
using the pen tool to create the bridge (1) and the feet of it (2)