Make a screenshot, a game frame or a photo look like it is being shown on a flat panel and photographed up close. The picture is resampled onto a grid of cells, each cell becomes three sub-pixel stripes, and the panel gets the flaws a real one has: backlight bleeding in from the corners, a wash when viewed off axis, and a few stuck pixels.
Cells and stripes
Pixel pitch sets the cell size as a share of the shorter side, so the preview and the download carry the same grid. Each cell is the average colour of the source pixels it covers, split into three vertical stripes in the usual red, green, blue order. Cells can instead be left whole, a plain pixel grid with no stripes.
Sub-pixel mask sets how far the stripes replace the flat colour. At 0 the cell is a block of its average colour; at 100 each stripe lights only its own channel, so a white area becomes red, green and blue lines, and a red area lights the red stripe alone. The black matrix, the dark border between stripes and between rows of cells, widens with the mask, since on a panel the two are one structure.
Backlight bleed
Edge-lit panels leak light at the corners, the bottom pair most of all because that is where the light bar sits. Backlight bleed adds a soft cool glow there, strongest in dark areas, which is where the eye catches it on a real screen.
Off-axis wash
Seen from the side, an LCD lifts its blacks and loses contrast, and the far edge of the panel washes more than the near one. Off-axis wash applies that gradient across the picture. It is the setting that sells a photo of a laptop taken from a chair beside the desk; for a straight-on shot leave it at 0.
Stuck pixels
Stuck pixels sets how many cells are locked to one colour, black or white. One or two are enough to read as a real panel; a dozen is a damaged one.
LCD or CRT
The CRT effect curves the glass, adds scanlines, a dot or slot mask and phosphor glow. This one is flat, with rectangular cells and stripes and no scanlines. Pick by the device: tube televisions and arcade monitors are CRTs, phones, laptops and flat monitors are LCDs.