- Download the latest release
- Open the
configsshared folder on you retropie installation (\\retropie\configs\on Windows,smb://retropie/configson Mac) - Recommended: backup the folder content!
- Copy the content of the chosen overlays folder into the share, and overwrite the files.
Each system has an appropriate overlay and shader configured to look the most like what the original systems did, while maintaining proper speed on a raspberry pi 3.
For the home consoles, the selected shader gives a "curved" appearance to the emulator, like you had with an old-school, not-flat TV.
Simulating that takes a few resources, but I think it looks better, and probably more faithful.
Prefer using a Pi 4 for better performances, a Pi 3 might be a bit slow, a Pi 2 will absolutely be too slow.
Disable the shader if it's too slow for you: in all/retroarch/overlay_cfg/common_crt.cfg, set video_shader_enable to false.
Most overlays have been created by Marblemad & Kam3leon, OrionsAngel and Duimon.
The shaders have been created by ghogan42.
The home consoles (8 and 16 bit) use the zfast_crt_curve shader. It's nice-looking enough, and the fastest around.
The more advanced consoles (PSX and N64) use the zfast_crt_standard shader, in order to be faster.
Handheld consoles use the zfast_lcd_standard shader, which is amazingly gorgeous and very fast.
If you use Retropie on a more powerful machine (PC or Odroid), feel free to edit all cfg files to change the shader to something better. There are a lot of nice-looking shaders out there; have a look at crt-royale, for instance, which requires a powerful GPU to run. The latest trend is using HSM Reflection Shader, which reflects the game on the bezels, or ReShade, a very powerful shaders tool.