RSRetroArch VS skyscraper

On the PC version you can add them with Reshade: https://github.com/Matsilagi/RSRetroArch

For CRT shaders on Linux, I'd imagine that Gamescope + vkBasalt (with these shaders) could work. I just discovered it today, but the results have been hit and miss (I've used it for MAME because I don't like its built-in shaders. Regular games like Minetest and Garry's Mod also work, but Minecraft and Freedom Planet don't)

I don't have a CRT, but I play all modern pixel-art games using CRT shaders for ReShade, especially CRT Royale (and a few others). Games like Blasphemous, Astelon, Infernax, Axiom Verge, and Chasm look absolutely fantastic with the default CRT Royale settings expect for interlacing which should be turned off for most LCDs.

To anyone wanting to play this game, do yourself a favor and install some CRT shaders for reshade for this game, the simple scanlines won't do it for this game and it's a quite a drastic change (be sure to put this on fullscreen on a monitor, not through a phone screen)

Here's some shaders for example: https://github.com/Matsilagi/RSRetroArch/

ES Desktop is great but I prefer Skyscraper for media content https://github.com/muldjord/skyscraper/tree/master

Yes, but I would suggest to make it clear on the front page / README that the project is no longer being maintained and you would encourage someone to fork it if they want to continue development. For example, like this project did:

You can try skyskraper, at least there is "Skyscraper works perfectly on macOS" in the description

This might help: Resource Cache

you might also try skyscraper, its a CLI tool for scraping folders to generate metadata for pegasus and other frontends: https://github.com/muldjord/skyscraper

It's highly configurable through the command-line interface: https://github.com/muldjord/skyscraper/blob/master/docs/CLIHELP.md

Doing this by hand would be quite tedious, of course. Lars Muldjord's Skyscraper (https://retropie.org.uk/docs/Scraper/#lars-muldjords-skyscraper) has an "import" module to cache local resources (https://github.com/muldjord/skyscraper/blob/master/docs/IMPORT.md)