What resolution are you running it to? Given the “tiny” screen, I’d try to go with 1080p.
Also what cores are problematic? Do they upscale?
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Yeah, I already tried with 1080p and same results… Anyways the MAME core (current) is especially problematic… I know that core is “heavy” but unfortunately some arcade games only work on the current MAME core. They look awesome with the sonkun shaders but they are too slow to play… Btw your shader is also fantastic, I use it a lot (and is faster) 
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Uhm, probably the phone is reaching high temps and it is throttling its speed and that affects the gpu too.
Happens everytime on my s10 with exynos to the point that i need to use 720p.
If you can stand some added latency, I’d try with threaded rendering turned on.
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An S24 can’t handle my presets? That’s interesting. Does the guest advance hd shader and ntsc variant from the crt folder run fullspeed by itself? If so then maybe you can use those versions without the “grade” shader that I’ve added onto my presets (assuming that’s what may be causing the slowdown) and then copy the settings from my presets over to those?
You just reminded me I also have a “lightweight” glsl shader I was working on in 2023, haven’t tweaked it in a while though, looks nowhere as good as my presets either but it’s usable and it’s only for 1080p:
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Was in the mood for some crt gaming when I realized I still haven’t tried RetroArch with the new crt I got my hands on a few weeks ago. I also remembered that I had a hdmi to AV converter laying around with two way male composite cable so I hooked it up to the tv. Now I just opened up a world where I can play 100’s of games on this tv. Here’s some composite shots for you guys:
I also wanted to show the rainbow effect in real time action so I recorded a few videos, the fringing is crazy. @guest.r your rainbow implementation is about as close to the real thing as it can get. @RetroCrisis the people that were leaving comments on the YouTube video talking about the flickering probably don’t know that the flickering they see actually happens on a real crt, actually it’s even more severe here:
Videos expire in 2 days but I’ll re-upload upon request if anyone wants to see them.
Also from what I’m seeing this converter I’m using seems to display all games in “2-phase” only, tried it with Ninja Gaiden:
I only get the vertical rainbows not the 3 phase diagonal ones.
On my current preset pack I lowered the fringing on my composite rainbow presets, now after seeing it on a real tv I kind of want to put the fringing back lol.
Edit: I just put up a new pack with that fringing setting defaulted so you all can grab it if you want.
Even RetroArch itself has some rainbow artifacting on the crt:
One more shot:
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Hi, sonkun. Which resolution are you setting RA to send to your TV?
I’ve spot graphical differences between real hardware and some alternative setup to connect emulators to send 240p to crts AV inputs. Depending on horizontal resolution, the rainbow effects may be different from real hardware.
Here’s my case using a Wii: When NTSC filter is mandatory?
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Converters are obviously their own configuration, normal ones don’t output 240p either.
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I didn’t set it to anything at all. I just connected my Shield TV to this converter and then to the tv then it was off to the races. What I do see in my RetroArch config file is “crt switch resolution” set to 0, “crt switch resolution super” is 2560, “crt switch resolution use custom refresh rate” is false and “current resolution id” is 0 if that information helps.
This may be the case, I don’t have the actual systems to cross compare, I was just happy to get some kind of composite video at all on an actual tv.
This was the converter I used, had it laying around for years:
Couple more pics from last night:
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Probably just a standard cheap converter. Afaik there is no converter which allows you to actually replicate real hardware, that would be the ultimate device if you could switch between systems that actually mimics the platform signal accurately.
One thing you could try if you have something available is trying RA with a different HDMI device, like a PC. It’s possible you’ll get some variance in output.
It is a cheap converter, you don’t see the price tag on that thing lol? Plus it’s really old made years ago. It’s ok if it doesn’t mimic real hardware 1 for 1, I just wanted to see some kind of composite output on a crt with those particular games that’s all.
The real fun comes when I get my hands on a bigger TV and then start collecting the actual older like systems like nes, snes etc again preferably with RF input instead.
Nice photos… Enjoy your CRT 
I don’t have a converter, I use CRTemudrivers 2.0 with amd graphics and outputs from VGA to scart RGB, when I can tonight I’ll show some photos…
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Hi @sonkun, do you still have your presets from 03-03-2024? I’d like to dig deeper into the issue and see what’s changed that could cause the freezing. So far, I’ve tested these cores:
- Beetle PCE
- FinalBurn Neo
- Flycast
- Genesis Plus GX
- melonDS
- Mesen
- mGBA
- Mupen64Plus-Next
- Snes9x
- SwanStation
Your presets freeze a game with Beetle PCE, Genesis Plus GX, and Snes9x. Interesting, that Mesen works fine. I thought the root cause would be 240p games…
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Actually I do.
Looking in the trash bin I noticed I still have a bunch of old packs going back a few years. Guess I could still archive things if I wanted to.
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Thank you! I just tried it with these presets and I still get the freeze. I now suspect the upgrade to macOS Sequoia or the cores to be the reason. As far as I can tell this means the presets are fine. Is there any other Mac Arm64 user who could test these presets for Beetle PCE, Genesis Plus GX, and Snes9x and share the results?
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The moment you said you were on Mac from the initial post I suspected it was something Mac OS related. I also forgot which guest.r shader update that old pack paired up with as well, I doubt that has anything to do with your current situation though.
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Your presets from 03-03-2024 pair with the version of guest.r shaders you get from the current release of the Retroarch slang shaders.
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That’s amazing if it does, figured with some of the changes and new settings guest.r added it would have things looking different or out of whack.
But I found my original post for that pack, I always include which guest.r shader version I’m using on any update I put out if you want that specific guest.r pack I used for that preset pack.
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Quick update, I made some small changes to my preset pack, didn’t feel like making a brand new post just for 1 setting that I changed but you can grab the new pack in the 1st post like always. Just changed a setting in my Shadow Mask 4k presets.
Edit as of 10/23/2024: Had to switch one more thing up with the 4k Shadow Mask presets. The previous crt mask settings I was using wasn’t giving me satisfactory results. This should be the last time I have to edit them though, I put up a new pack under “release 4”.
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New Version Release (10-29-2024)
Changes Made
-
Uses guest.r shader version 2024-10-27-r1.
-
4K Shadow Mask presets use new “mask zoom” settings, looks better than ever now (They only work with the latest guest.r shader update so be sure to update those shaders as well).
-
3-Phase Chroma Scaling/Bleeding setting adjusted on all composite rainbow presets (Previously had faint barely noticeable diagonal lines across the screen on certain backgrounds.)
Screenies (All images are from the 4K Shadow Mask presets only):
Grab this latest pack in the first post.
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I am getting the “Can’t apply shaders” message for your shader presets. Any reasons why?
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