Thursday, September 3, 2009

Computer Graphic Potrait Tutorial Guide

This is what i learn while trying to do a portrait or this face in computer graphic (CG).

Started of with the base colour of the skin and paint a block of head on a layer. This is to get a transparency colour at the background later.

Just like this Picture Below, i made the base head and Zoom In to one of the eye and started working on that eye only without worrying on the other part.

I sketched only the eye first. While comparing the original and the work in process i coloured it a little by little till it reaches the right colour. I used the Dodge and Burn tool with 5-6% opacity for the darker or lighter shading. For the normal soft brush i used 15-20% opacity to colour the skin. I also used Multiply brush with 30-45% in creating the hair lines on a new layer and if its too dark i turn the layes opacity or fill low.

After im satisfied with the eyes part, i click on the arrow to go down. I count 10 click scroll to the other eye and do the same at the original too while keeping both original and my current work in the same size. I start working on what i see, like for instance, i saw the nose and curves and the other eye. I sketch it and paint the colour in. I love using pure white for the eye so it stands out, and yes when you smudge the edge it will get that grey eye.

See i havent started with the dodge yet and used soft brush and burn only so far, Dodge is always used last only for the lighting. So while it looks cartoony with the base shape and colours just like the small picture here.

I continue the same methods by moving down for the mouth. But with more layers to help avoid mistakes, and i used duplicate layer as to keep one layer as back up if i want to work on the main picture.

See the rough sketch there and i colour the lips in base colour before giving it details? Well at first i got scared all of my art works turn out like cartoon, but thats the start of a great art! Dont give up if it look like cartoon, all you need to do is give it details. How to give details to art? Well its simple actually, see the top of the lips got some dark shading? Give ur art some shading, use soft brush that i mentioned earlier and the colour brown that you can select from the original picture by using the pick tool and shade it a bit. Once done the move on to the lips, you will get a purple like colour when you go over the dark edges of the lips. Use that colour ant colour the edges that you sketched with burn tool and some soft brush. Start using the lighter colour for the skin and lips. A simple tip on art is Dark colour give depth and bright colour give the shines mix both you get a beveled look.

See the semi half details painted over? Whenever im feeling i might ruin the painting i put on a layer to test whether its the right way to paint or colour something. This helps to learn more about techniques in Computer Graphic Painting.

Notice at the small navigator thing, the face started to look more realistic. And when you feel the eyes, nose and lips are all alligned in the right order and colour. Then u may adjust the view by zooming out. But do compare the original and the Art work.

I added few shadding for the cheeks and the depths by burn tool. I do the Ears after i put the hair on. Doing the hair was fast and messy, i use a base near to black colour but never pure black. Then used another layer to use multiply brush for the hair with 10 pixel degrading to 1 to 5 pixel each hair. Just for the out look that the face have hair, hehe. There the original...

This is the completed art piece :P Its my cousin Ash~

Summary :

1) Colour base ( Medium Hard Brush to have a face only)
2) Sketch Outlines
3) Colour From the Eyes or Any spot Zoomed
4) Move to the other part same position and size with original
5) Burn Brush for Depth or darken the area (Always 5% opacity)
6) Soft Brush for colour blending (Always 15% opacity)
7) Dodge brush for lighting and used last (Always 5% opacity)
8) Multiply brush for hair only (Always 35% opacity)
9) Compare the picture often
10) Use pick colour tool for if you cant see the difference in colour

Feel free to share opinions on this matter :)

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