From the desserts hoarder: "The screen in question was from the very first version of the shader set. Since it was added, the following changes have been made: - Independent scanline brightness scale and offset; this can be tuned to produce a more realistic presentation whereby bright colors cause the scanline intensity to be muted. - Full YIQ colorspace convolution for the purposes of NTSC simulation. - Dot-crawl simulation for NTSC simulation. - Chroma subsampling simulation for NTSC simulation. - Independent radial deconvergence for red, green and blue channels - Defocus - Phosphorescence based on a max() function rather than a linear blend - Per-channel phosphor non-linearity simulation via a pow() function - "DC offset" simulation (i.e., black being rescaled to be non-black but the upper limit but it is scaled such that 1.0 is still 1.0)"