A pixel circle generator is software used in the creation of circles from blocks. Programs that make use of a pixel circle generator include MS Paint, Gimp and Photoshop.
The circles vary in size depending on the user's preference. The best shapes are achieved when the circle size is an odd number, such as 25 x 25. The pixel generator allows a user to draw different sizes of the circles with the correct aspect ratio. To draw a perfect circle in the software, pick a circle that has all the four quarters exactly the same size; this is known as a perfect sphere.