Have already uploaded this to the contest gallery, so it is sort-of finished.
Too bad that inkscape's gallery doesn't render as the latest build, since it is using heavily some of the new blending modes.

Here is the "real deal" related to the rendering:




For the svg, check this link.
Don't forget to open with 0.92+


Edit:
Some fixing up on the lighting.
-the original svg is updated too-




Edit 2:
With another backdrop.

Can't complete just stop working on it...



Probably will tweak the background a bit more -still two days to go.


Edit:
Another variant.



svg source