Take the Input Gamma and crank that up to 3.75. Reduce the 2 scanline options until they are off. This shader, along with the GTU-V50 shader does a tremendously awesome job of replicating the colors of a CRT television.Īnother shader that does this well is the CRT-Pi shader preset (found under CRT Shaders.) I take this preset and go into Shader Parameters: Under reshade, I select the "BSNES Gamma Ramp" shader (It's the LUT shader with a preset value of "32.") This works great with or without bilinear filtering. To me these more closely resemble the composite colors of the NES on a CRT. On any of the NES cores, I usually opt for one or two of FirebrandX's palettes, either Composite Direct or Smooth. (I do this because the raw colors can look garish by default.) This brings it closely to how it looked on the OG display. On the mGBA core I enable the GBA color correction option. Here are the two respective system options that remain consistent across all platforms for me: Let me know what you think or if you need any help.Shader selection hinges on what device I'm running Retroarch. Scanline with aperture grille 50% opacity Scanline with aperture grille 75% opacity Scanline with aperture grille 100% opacity You can do this in firefox by right clicking the image and selecting ‘VIEW IMAGE’Ĭloseup image showing the 2 overlays in use at 2x the size and at various opacity levels: Be sure to view these at full resolution otherwise they won’t look correct. ‘OVERLAY OPACITY’ and adjust the opacity by pushing left or right.īelow are some example screen captures. You can change the opacity of the overlay to your own preference by going to: ‘ scanline-grille-1080p-224.cfg‘ is scanlines with an aperture grille effect as well ‘ scanline-1080p-224.cfg‘ is just scanlines Once in Retroarch go to the menu and under settings goto:Īnd from here select one of the overlay configs that you copied over. Then: ‘USE VIDEO OUTPUT RESOLUTION’ (assuming that you have your rpi set to 1080p). You can set this by pressing ‘x’ after selecting a game. To use the overlays unzip the archive which I will link to below and copy the directory to the following location: /opt/retropie/emulators/retroarch/overlays/effects/scanlinesĮnsure that retroarch is rendering the display at 1080p. This includes CPS1, CPS2, Neogeo, Genesis/Megadrive, Snes and many others. To start with I’ve created two overlays suitable for use with systems that have a vertical resolution of 224. The downside of this approach is you can’t have a “one-size fits all overlay” as there are several different resolutions that systems use and so you need a different overlay depending on the vertical resolution of the game being played. My overlays are pre-scaled so that they match perfectly with the scaled game image. Most other scanline overlays are designed to be used with integer scaling switched on but the downside of this is you either have a black border or lose some of the image. I wanted to use scanlines but also wanted to display games using the full height of my TV so have created some retroarch overlays to achieve this.
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