Inkscape tutorial blending modes and layer panel
http://www.youtube.com/watch?v=HKITjvSndfk
http://www.youtube.com/watch?v=HKITjvSndfk
http://www.youtube.com/watch?v=rAV1lgQxmiY
http://www.youtube.com/watch?v=QaXYwI1erSM
http://www.youtube.com/watch?v=BpjooHkj0SY
http://www.youtube.com/watch?v=utNggiNkROo
http://www.youtube.com/watch?v=38tHLyovJjE
http://www.youtube.com/watch?v=ZF3fqj8aRhc
http://www.youtube.com/watch?v=V7HtnjtdfXA
http://www.youtube.com/watch?v=jRVCLbsaAqg
http://www.youtube.com/watch?v=rYxicxnCoWA
http://www.youtube.com/watch?v=MgkSPQBY4lA
http://www.youtube.com/watch?v=3RfKe8Cnt6Q