I never thought that it would be sooo difficult!!! It takes about 9 hours to complete for me, but it was really interesting! Also, I've found that the topmost conus in the practice sheet has the sligthly wrong (as for me) shadow, so I've shaded it to make the shadow casted exactly to the right. But may be I'm wrong..
Also it was surprise for me that Gimp 2.8 is able to open PSD files!! So the exercise was done in Gimp 2.8.
Thank you Tim! This practice was really interesting and usefull for me!
