This one has a Moiré effect that I dont understand the cause of. Feel free to use the pictures, they are both pixel based.

So Here are two samples of circles that I had to import because one of art programs that I used did not draw circles symmetrically. One type uses a frame to define the circle using a frame ( this is what MS Paint uses ), the other way which I prefer uses the pixel point as the center and the size is determined how far you pull the mouse pointer away from that point to make it big or small ( this is used in Deluxe Paint IV, III, IIe ( IBM only ) by Electronic Arts ). I discovered that there were two types of ways of drawing circles in the art programs that I used.

however, when I change the resolution size I get this strange Moiré effect at different resolution sizes that have bugged me.

Ive had problems with using some art drawing programs that drew circles incorrectly and so I had import circles that I drew on a old drawing program into the art program that I was using.

Draw perfect circles