Stephen Andrews (artist) to his own experience of living with HIV. Andrews’ method of homemade colour separation evokes both the 19th-century painting technique of Pointillism: “in which small, distinct dots of pure color are applied in patterns to form an image”, and the Ben-Day dots of mechanical printing. Beyond these references, Andrews’ uses the technique to, at the same time, evoke the alchemy of vision and break its mechanics down. As a result, Andrews creates works that “hover at legibility.” “The pixilation or dot matrix completely obscures details, making specifics impossible to see. We can't grasp the full picture.“ The series of rubbed-crayon
Blend modes layer" or "active layer". Most graphics editing programs, like Adobe Photoshop and GIMP, allow the user to modify the basic blend modes - for example by applying different levels of opacity to the top picture. In the formulas shown on this page, values go from 0.0 (black) to 1.0 (white). This is the standard blend mode which uses the top layer alone, without mixing its colors with the layer beneath it: where "a" is the value of a color channel in the underlying layer, and "b" is that of the corresponding channel of the upper layer. The result is most