Thanks for your continued work on this.
I adapted your ReShade port of the HD variant to Duckstation last year and fixed a few bugs as well (probably conversion bugs that were introduced when moving to ReShade). Maybe you fixed those already in your new version, but I just thought I’d let you know, maybe you wanna take a look 
UPDATE - Several Fixes for all the shaders.
@ynnad4 can you check if NTSC Coloring/Rainbow Effect (2 Phase) works for you now.
It’s working on my end -
See if any of these two work (just copy & paste them into CRT-Guest-NTSC.fx) -
And make sure Performance Mode is ON in the ReShade menu.
thank you for the help. I still dont get rainbow, not even dithering.
Maybe this is related to the screen resolution i have ? its 1600x900. I cannot set it up in 1080p because the monitor is old and only vga.
first 2 pics are test 1, and last one is test 2
Hmm. Monitor resolution shouldn’t matter as I have tested NTSC Rainbow in Sonic Mania at 1600x900 without issues.
Can you post your settings here? And does everything else other than Rainbow work as it should?
Sonic Mania paired with the guest-advanced-ntsc shader, that’s a match made in heaven. Incredible stuff.
Those settings look fine. What I’m most interested in, is your Resolution_X and Resolution_Y settings. Please post them here too.
EDIT - Same settings as your screenshot with game res at 1600x900 -
yeah, i’ve checked in the past these 2 parameters from bottom to change resolution.
By the default they appear in grey color. If changing some value, then moving to another parameter, it goes back to default number. It states 320 x 240.
If pressing enter in one parameter then the other, it shows what you can see on these pictures. In real time, the image has flickering between red & black colors. And it makes no difference with / without performance mode
its set to 1600x900
You should use 424x240 here for Sonic Mania to get NTSC Rainbow to work. NTSC Rainbow doesn’t work at high width (Resoution_X) resolutions.
Also, I can’t do much about the red & black flickering without some error logs.
This is a ReShade bug. Remove all the other CRT-Guest-NTSC.fx TEST files from the Shaders folder. Then see if the Rainbow effect works.
This is why I said you should copy & paste the TEST versions into the existing CRT-Guest-NTSC.fx file.
Don’t forget to check if any of these work too (by copy & pasting) - CRT-Guest-Advanced, HD and NTSC for ReShade!
Finally at last !!!
Thank you so much for your patience, kindness and help, bud !
solution:
remove the test files. they will this resolution bug in reshade
424x240 - This was important to know. I didnt see anywhere on this mod thread to have it that way. Which ONLY works if added up alongside the next step.
Performance mode. I’m not sure if it was specifically intended to use with this mode but, neither I saw this step as requirement since first post OR anywhere across the mod thread. I didnt see anywhere around here suggesting it.
In RetroArch, step 2 is automatically done, so these 2 last steps seem like specifically required for this game OR the rainbow NTSC effect.
Thank you once again, it looks wonderful. And yes, from one of your previous questions, dithering + Rainbow banding both together make magic in this game. It definetely benefits from these old school effects.
I was looking for Rainbow effect since years on this mod thread. I can nothing but thank you so much for updating Guest’s presets into ReShade. You and Guest made the perfect combination this time.
@sonkun This effect may be useful to you, besides being outside of RetroArch.
Need to ask by the way, in case its possible to be made but, do you know if this project could be possibly imported to RetroArch or ReShade ?
The old 90s NTSC/Pal looking is amazing and its a shame that is a 3+ years old post and there are no news about this project just yet.
It could be an alternative to Guest’s NTSC preset.
Updated the shaders to the latest (crt-guest-advanced-2025-06-20-release1) version!
CRT-Guest-DX9 (Seems like some GPUs still need this.)
Awesome! I’ve been wondering about something for a while, though. How would one figure out the content’s resolution outside of RetroArch? For example, I’ve been assuming a 800x600 res for pcsx2 and Dolphin, just to set something reasonable and with 4:3 ratio, but I know RA would not use that value.
I just do 1920x1440 (4:3) on my 1440p monitor for both PCSX2 and Dolphin. And then just set Internal Resolution at 4.0 to blur/blend the image.
You’ll need something like Res-O-Matic to run PCSX2 and Dolphin (or any other emulator) at 4:3.
I even use the same settings for some older PC games -
Oh man, I didn’t think about converting the monitor resolution to a 4:3 ratio with PC games… This eases the color bleed from the mask that led me to mess with shadow_msk values a few posts pack.
In my case it’s 1440x1080 for a 1080p monitor, if I’m not mistaken. Might need to experiment with the horizontal res a bit too, but this is an improvement.
I’ve also been increasing Internal Resolution for some PC games like Resident Evil 1-3 ports with the REBirth mod, so at least that’s something I was doing right.
Not sure what’s the difference between leaving pcsx2 and Dolphin at native res and 4:3 vs. using Res-O-Matic, though. I’m on Linux so that software won’t work very well.
