Aquest dibuixa una caixa i alguns segments de línies, i genera un difuminat radial cap enfora. Això crea efectes de camp de flux. Es fa renderitzant l' escena amb una textura petita, i renderitzant repetidament versions d' aquesta textura augmentat- ne la grandària i la transparència en la targeta gràfica. Per tant, utilitza força la GPU: si no teniu una targeta bastant bona, pot afectar bastant a la vostra màquina. Escrit per Jamie Zawinski; 2002.
This draws a box and a few line segments, and generates a radial blur outward from it. This creates flowing field effects. This is done by rendering the scene into a small texture, then repeatedly rendering increasingly-enlarged and increasingly-transparent versions of that texture onto the frame buffer. As such, it's quite GPU-intensive: if you do n't have a very good graphics card, it will hurt your machine bad. Written by Jamie Zawinski; 2002.