Computer failure

Okay, I will try and post again about my latest work and hope my computer doesn't fail again.  I am working on a painting of tractors.  I wasn't happy with one of the tires on my first try and reworked it till the paper failed.  On my second try I had figured out what I didn't like about the tire, but something was wrong with the paper.  It made all of my paints granulate.  I decided to cut my losses and keep my sanity.  So, this is the third try.  
    Perception is a funny thing.  I took computer science in college (one class) and I remember saying that perception would be the hardest thing to overcome in the evolution of computers.  I was convinced, and still am, that eventually it will all be chemical processing, but perception would be a hard thing to control.  But, my professor's definition of perception and mine were two different things.  Funny.  Sort of proved my point.  His definition was quite literal.  His definition of perception was that a robot could identify a cup as a cup.   To me, that is identification, not perception.  Perception is more ephemeral.  Case in point...my family perceives this tractor painting as bright, intense color.  But, while I am painting it I think it is dull.  If I step away from it and look at it from a different angle, it becomes more pleasing to me.  Brighter.  But I want to keep that bright color, so how I finish it out is really important.  I guess my problem is that I like it surrounded by white.  I'll figure it out eventually.