A work in progress preset using Guest adv NTSC shader, the goal is to have some level of “composite” feel but at the same time keeping a decent level of details and sharpness:
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Wow!
Is this that thingy that allows you to maximize brightness without clipping?
Not bad at all! Looks almost perfect to me. Love the saturation levels and accuracy of the colours, clean edges and scanlines. Lots of detail to be had and edges look smooth but not blurry.
The only thing I would probably change is the dark halo around edges like the “TM” and I could also see it on the edges of the “Super Metroid” and other bright edges.
Tell me more about this shader. Is it included in RetroArch?
What’s going to be the future of “inversegamma”?
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That shader is ‘crt-beam’ in GLSL. Didn’t ported to slang yet. Yes it is that function that recovers most of gamma lost due to scanlines/mask overlay. Didn’t spend much time investigating the function, but looks promising, works as it should already. Credits go to Dogway for this.
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New release: crt-royale-1080p-v10
I toned down the diffusion parameter (it gives some kind of bloom aura) and tweaked some other parameters to compensate a bit so that the overall brightness is now more balanced. The old preset is renamed to crt-royale-1080p-bloom and is added to the pack, because I think it’s still good for dark games. And the last change is the folder where it should be installed. Now it should be put inside “shaders_slang” folder.
If you desire to test these presets on 4k displays, my tip is to change the parameter “Mask - Triad Size Desired” from 3.00 to 4.00.
EDIT: I can confirm bloom option is very good with BFI enabled in RA, at least for cheap monitors that lack brightness using this feature like mine. 
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Your tweaks is breathing new life into the Royale shader. Good stuff here
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I don’t know if this is the correct place to say this, but I need help! Does anyone know if this color is NTSC?
I want to achieve this like in my CRT:
The blue colours tend to look more purple in general on the shaders, you can notice it more in the front tree area and the clouds,
I Find the blue colours phosphors are not as dark than this:
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Try the lut option 4.0, which produces a ‘ntsc colors’ look. Or you can prepend the ntsc colors preset from the /misc folder in the slang shaders folder.
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Thanks for the answer, but I found and option called Grade colour. I know it’s not from your preset, I think is a Mega Bezel preset, I think that option has to do something about it, has to tend to correct colours and make them more strong, but I think it tends to be more purple. Apart from that I’m from Spain Europe, and I know colorus in Spain are pal. I set the colours to pal, about lut colours are in default 0 EBU and 0 trinitron. I will try to set lut colorus to 4 and make comparisons. Thanks for your help as always! 
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I know perfection doesn’t exist, but at least colours look almost similar. Thanks
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ntsc-ompuco and crt-sines, glsl
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Are these the Shaders that you’ve been hard at work on porting from C to GLSL?
Finally I achieved what I was looking for 
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This comparison is phenomenal!
Congratulations!
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No this is a different port i did from Shadertoy to GLSL, it’s a pretty cool shader, try to play with settings a bit on Retroarch. It’s not far from the real thing comparing with some captured (SNES at least) Composite signals.
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First participation, I’m a beginner, I don’t know much about it. I had to search for a lot of information to learn and understand how to create a shader. I’ve gone through the forum extensively, I’ve made a first attempt. Here’s the result in a photo. I would just like some feedback to improve. I specify it’s been at least 1 month I’m on the test lol
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Thank you very much!!! 
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You are welcome!!! Enjoy the forum.
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