Having A Go At A Portrait

Hi, this is just a pic of my rug rat’s that I have been attempting to sketch. It’s the first time iv tried a portrait, it’s not finished, but I thought I’d post it anyway. I have been using the Drawing for Dummies book and found it very good, I would recommend it to anybody who like me saw art as a fuck about at school. Its got various exercises and tips to help you, but sometimes its good to get pointers from people, so please point, in the right direction, help defining the edge without making it sharp looking and getting enough shading to show texture but keep light things light, etc, etc. Dont just say it’s shit because I know that and dont worry i’m never going to try and tattoo a portrait, full respect must be given to anybody who can do a GOOD portrait tattoo. ;)