Press the green flag. Change the slider to the number of screen passes you want (less screen passes the more contrast in color). Press space to render. Once complete, the number in the bottom left will indicate the amount of time it took to scan the image. Afterwards, press the 1, 2, 3, or 4 keys to add effects. The 1 key shows how most colorblind people see the image (including my friend Harley). The 2 key reduces 25% blue light. The 3 key reduces 50% blue light. And finally the 4 key reduces 75% blue light.
