Post processing - pencil drawings
(Since these seem to have gotten lost at the back of an older thread, I'll give them their own thread.)
Original:
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The basic technique is to convert the image to black and white, make a duplicate as a new layer, convert the top layer to a negative image, use the Dodge blend mode for the top layer (this will make the image appear nearly completely white), Gaussian blur the top layer (the amount of blur varies considerably - you just have to play with it), adjust the opacity of the top layer to let some of the lower layer show (generally no more than 25%). If desired, use the charcoal art media effect to provide the finishing touches (I used it on both of these).
I have used this technique with color, as well, but couldn't get a quick example to look right.
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I still do all of my stuff by hand. But then, again, I had to be dragged kicking and screaming from DOS 
Paintshop Pro has a pencil effect, but it either doesn't work well or I haven't mastered the technique yet.
The technique I use works well on faces, but I didn't have any portraits to throw up without consent - so I figured the blueberries were similar in shape and texture. (I ate some this morning so I can attest to their delightful texture 
)
The bike one surprised me - all the previous ones with so much detail haven't worked well. If I were doing it other than just to play with it I'd perfect it a bit more - but for a 5 minute play time, I was quite pleased with the effect.
I figured this out using Irfanview.
