1. A method for calibrating a dual series modulated projector display system, the method comprising: receiving input image data; computing an image to be displayed on a premod modulator of a set of modulators configured in series based on the input image data; applying a light field model on the computed image, said light field model based on a PSF model of light emanating from the first of the set of modulators as to how it illuminates a primary modulator being a second modulator of the set of modulators and thereby determining an actual light field image on the primary modulator; computing from the actual light field image a primary image for said primary modulator; displaying a screen image from said primary modulator using the computed primary image; and adjusting the PSF model based on differences between the displayed image and an image intended to be displayed according to the image data.