A technique(1) is presented to simulate the effect of localized atmospheric obscurants (fog, dust, smog, etc.) in graphical images. Using meteorological modeling, images with a specified meteorological range (visibility) are generated that modify object colors based on the presence of localized and/or generalized obscurant distributions. Two general cases are presented: multiple transmittances resulting from a single obscurant, and multiple transmittances from multiple obscurants. The process was implemented using OpenGL with a Motif user interface.