It seems latest guest update became incompatible with the pack and shaders do not load.
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Thanks for reporting, will be fixed in next update of crt-guest.
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Hey, guest.r and sonkun! 
I’m unable to get any of sonkun’s presets to load on Android (Retroid Pocket 5). I’ve tried each of your updates starting from 2025-01-19-r1 all the way to 2025-10-12-r1. I’ve also tried both vulkan and gl drivers, as well as different RA cores. The guest presets seem to load no problem, just not the sonkun ones.
I’ve read this guide a bunch of times to see if I missed something, but I can’t get them to work. In the meantime, I still had the older sonkun presets on my PC, which are working fine on Android.
Any help or guidance would be amazing. Thanks!
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Hello @sonkun!
What a wonderful work! Can’t thank you enough.
Please, I have a simple question if someone can help me.
On the installation instructions it’s said "For this update you will also need guest.r’s latest shader update" and the link takes you to the “2025-01-23-r1” of the guest.r shaders.
BUT, that version it’s not the latet anymore. So, canb I use the real latest version of the guest.r shader (right now it’s the “2025-11.02” version) and get the same results on the Sonkun presets? Or it must be the “2025-01-23-r1” version?
Thanks a lot!
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You can safely use the latest guest-advanced version.
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Hi @guest.r!
Thanks a lot for your response and wonderful work.
A last detail: the latest version of guest.r on the topic of the libreto forum (“2025-11.02” right now) is the same as the one from RetroArch if I run the update first (“Update Slang Shaders”)?
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Current repository version is “2025-03.30”. It should also play very well with Sonkun’s presets, since they haven’t recieved updates since a while, but latest guest-advanced versions have some additional tweaking options, if you want to start or change something by yourself.
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Hi @sonkun!
Were your shaders designed for use with HDR as well? If so, are the HDR settings on Retroarch (Peak and Paper White Luminance) sufficient, or are there other recommended changes in RetroArch settings or in the shader parameters?
By the way: I tried to find something here but found no information about it.
Thanks in advance!
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Hmm, the file “crt-resswitch-glitch-koko.slang” seems to have vanished from both the libretro repo and the authors repo.
Thank you for the work on these presets btw, they have always been my go-to 
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Hello, I just wanted to give you a big THANK YOU for your work. I’m European and PAL artifacts shaders are rare to find and not so realistic. But your PAL shader automatically unlocked memories of how my NES looked back in the day on my small 14" TV, with the Mario green pipes having that “dance” of diagonal lines when the screen scrolled, or that subtle image shaking when the game is on pause.
I currently use a Samsung SyncMaster 19" CRT at 2048x1536 with your 1440p shader and I’m loving it, unlocking more memories like when I first played the N64 on a store, or playing a PSX on a friend’s house. I’ve been using emulators since the Nesticle and ZSNES times, and I don’t think it can get much closer to the real thing, thank you very much for this collaborative work. BTW my kids of 4 and 6 are also loving it.
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Never used shader glass but I’m sure with all the new updates guest.r put out something has most likely changed to make my presets break or something. Just coming back on the scene after months of being away and I also noticed after I downloaded the latest guest.r shader update something looked off with my presets right away, I nailed it down to the “LUT 1 Toggle” setting, after turning it off things seemed to appear normal again.
Hmm not sure why they won’t load either, my is really old and outdated now plus I’ve never used a Retroid Pocket so I can’t even try to test it myself.
Thank you for the compliment and glad you like my pack. Technically you can use guest.r’s latest update but there’s been some kind of change I’m unaware of that has altered a setting in the “grade” shader that I use, it’s the “lut 1 toggle” setting, you’ll have to turn that off or colors look really strange.
No they were designed on a standard 4k lcd screen, I don’t use hdr nor oled. I actually advice turning any kind of hdr off as I’ve got glow and bloom settings cranked up through the roof already to brighten up the image.
Wow that’s amazing, not only are you enjoying them you’re passing down the fun to your kids as well. Thank you, it’s words like this that keep me motivated to continue trying to improve them and I will. Stay tuned. I also posted some new screenshots in guest.r’s thread as well, first new pics in months actually.
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It wouldn’t be right to just return empty handed without some kind of gift now would it? Been a while since I posted any new preset, just to get the ball rolling here’s some samples of me trying out for a new look:
@kokoko3k I’m trying everything I can to get rid of that damn moire in OutRun lol.
Try out the samples here:
https://www.mediafire.com/file/d244ah82wld84mq/new-sonkun-preset-samples-01-15-2026.zip/file
Unzip then move or copy and paste the presets directly into the root shaders folder not shaders_slang.
These presets use the latest guest.r shader update so be sure to grab that here and install his update first before loading up a preset.
Trying for a different look for this year, try them out and see if there’s anything I should add, take away etc, all criticism welcomed. All presets now use “mask 6” across all resolution types. No hdr needed here I got bloom and glow settings cranked up that will blind you so turn hdr off lol.
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Yesterday I spoke with him. He said he was waiting for you so patiently since long time 
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Huge fan and have been using your shaders exclusively for years. Curious about the 2026 version, since I can’t imagine them getting better (but excited to update the slang filters to latest without breaking anything lol) hope you do aperture style masks again too!
And please don’t remove the little banding effect when the resolution changes. That small detail adds SO MUCH to the charm of the filters!
The only sad part about your shaders is that they’re so good, I wish I had the same experience with other emulators like PCSX2, Xemu, Redream, Dolphin, etc. though I’d think setting up Reshade presets would be a tall order.
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Hey welcome to the forum nathanook I hope you enjoy your stay. That 2026 pack was just a small teaser of me trying out for a new look to replace my old pack, I typically always start with just slot mask composite and rgb presets just to get something going, plus that release was also to let everyone know I’m still alive lol.
The full release will still have all the presets you know and love, I’m unsure how I’ll go about my PAL presets though. There has been a brand new exclusive PAL guest.r shader added to his pack, the question for me is do I replace my current PAL preset for his version or just keep what I already have? Not sure how I’ll go about that.
In the meantime I’m still playing around with settings but I guess I’ll be gearing up to release something close to how that sample pack looks. If there’s any suggestions or things you’d like to see added or even taken away definitely suggest them, I’m down for changing some things up as I go along.
I’ve never used Reshade but I think there’s also other alternatives out there like Shaderglass I believe if I spelled it right, I think there’s other alternatives as well but can’t recall. These new samples should look a bit better on those kind of systems as well if that MVC2 shot above is any indication.
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other alternatives out there like Shaderglass
To say the least: your preset is included by default! Definitely recommend the above user try it out.
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Wow I didn’t even know that, gonna be even better once I replace that old pack with this newer one I’m working on. I think I finally got a grasp on being able to have a bright image while still keeping the smaller intricate detailed graphics on screen, things like the OutRun shaded clouds or Ryu’s shaded areas in his white gi. This upcoming update might just be the one to top all my older ones, we’ll see I guess.
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Unfortunately Shaderglass has some issues they still have to iron out (like being able to start automatically when you launch a game/emulator.) It’s also not quite compatible with Windows 10 and creates a yellow border that’s a hassle to hide.
That being said, I didn’t know it had Sonkun shaders in it! That’s really neat and I can’t wait to check it out.
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someone working on ReShade addon that enables the use of librashader https://github.com/SnowflakePowered/librashader/issues/160
dont know if it will be opensource or not, or even work without “Lossless Scaling”
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