I think I've seen Electric sheep before somewhere, but at the time I was just starting with apophysis, so I didn't pay too much heed to it. But it seems they do use similar systems for the fractals, so in principle they should be compatible. I'll look into it soon.

I've got to say, I've never really seen fractal art before (atleast, not good ones...) and the beauty of these shapes caught me by surprise. I think I'll try my hand in drawing these things with apophysis, as although I never was a very artistic type, I think I'll make an exception for fractal arts.
Fractaling with programs like apophysis,
ultrafractal or
incendia is quite diferent from the normal artistic procedure. At least for me, I don't start with a clear picture, but instead I go "exploring", trying different combinations to see what looks best. Nowadays I do have an idea of what shapes some combinations can create, but I defenitly don't know everything, so ever so often something new pops up.
I do have to give you one tip for dealing with Apophysis: Normaly, apophysis displays a set of random, swirly paterns. While these can sometimes be interesting, you have almost no controll over them. But if you look on the bar above the screen where the fracvtal is rendered, you'll see a buton with 2 triangels. If you open that, you'll get a screen where you can edit the diferent parts of the fractal. From here, you can realy influence what's going on, but it'll take some time to get how everything works. But once you start to understand parts of it, you'll be able to predict, to a certain extent, what some changes do and as a result you'll get more interesting shapes.