Nah...
You can calibrate the geometry by that large central impact crater which chows lighting in the full jpeg
Comes from the top of the page.
Then, we observe:
1) each spider has an overall mound-like morphology
2) There is often a central pit or depression
3) The "limbs" or branches of the spiders are each small troughs.
I seem to recall you guys had a problem with in/out ness of images on another of your studies. This is a trick thing that you need to keep chaecking against objective standards because the eye/brain keeps making the image "pop" the other way when you aren't looking!