I get these artifacts too, I found the following “fix” in the GLSL version (should work for the SLANG version too):
Open the following file \shaders\shaders_glsl\crt\shaders\guest\lut\lut.glsl
Go to line 150 change and change the 1.20 to 1.0
res.rgb = pow(res.rgb, vec3(1.0/1.20));
So it’s like this:
res.rgb = pow(res.rgb, vec3(1.0/1.0));
This has to be done everytime you update the shaders folders.
It worked. Thank you.
Can anyone tell me if these settings are similar to how Genesis games was seen on a typical consumer tv in the 1990s? I didn’t have a real Genesis but I still want to recreate the original experience.
Could you show a picture of a waterfall in Sonic 1?
Ar any dithering effect that needs to be blended into transparency or extra colors. That’s when you know you are doing Genesis right.
left is wrong, right is correct.
Uploaded screenshot. Take a look 
Well you got your answer then 
You got the dithering right, as for the scanlines and such, that depends on the TV. Mine was more like this (shown only the bottom corner of the screen):
And this (full screen):
I don’t remember scanlines in my TV set.
Then it had really light scanlines like a nanosoft or something. Which just means you probably should still use scanlines just use ones that are barely visible (I feel like you still need scanlines regardless).
Personally it depends on what system I’m running to decide how I do scanlines. (High color count arcade games I do nanosoft style scanlines (almost not visible). For Nes (8-bit stuff) I tend to like a heavier scanline like a BVM/PVM (like solid black lines across the screen, yes I know black lines aren’t the scanlines). And 16-bit games (Snes and Genesis) I tend to do a middle ground of the two.
EDIT: Sometimes it just depends on the game what I do, but I still haven’t settled on a setup for N64/PS1 and Dreamcast games.
You can’t expect a CRT from the 80s to be as sharp as one from the 90s. More modern and sharper CRTs show better scanline separation. Old ones are blurrier as everything appears more mashed together.
Are you replying to me or someone else?
EDIT: Sorry that sounded like I was wanting to argue.
To the “I don’t remember scanlines” comment.
Any tips about the vertical video configuration? Resolution, offset, height and width?
EDIT: First I calibrated the look of the screen and made a new bezel. But the mask and scanlines do not reflect the reality of a CRT monitor. Do I need to make any changes to the parameters to get the same shader quality for the horizontal monitor?
…I bought a monitor stand that rotates and it was the best thing I ever did for vertical games.
Probably should enable Tate mode in the shader, results may vary lol.
@HyperspaceMadness I was bored and looking around shadertoy, would this be of any use for the bezel?
I tried withou sucess
Could you repost your settings? Links down
Hi,
This combination of shader is great, I still need to tweak my settings but the rendering is really nice I think.
Just that the TATE Mode seems to be broken (Final Burn Neo) with the glsl and slang shader
I must also try the parameter you gave for artecfacs with LUT
I think we should try to move towards such combinations unfortunately I do not know enough …
I still have to try in Sonic1 for dithering and the parameter for 3D games
It also remains the moire problem with curvature, I try what is mentioned here but without success
https://filthypants.blogspot.com/search?q=ewa+curvature
In any case a big thank you to you
Thanks for the link!
Something I wonder about is if people would like some tube reflection effect on the screen like what is shown in the shadertoy.
My experience with putting reflection on top of the tube through overlays has shown me that for my tastes any more than a slight reflection is very distracting while playing the games.
Yeah the reflection on the screen is distracting, mainly posted the link because a dynamic bezel seemed fancy and really useful for this. As if it worked well as a replacement we wouldn’t have to make multiple bezels for orientation and resolution.
EDIT: On the subject of moire mitigation, @hunterk I’ve been trying for the last week to add the moire mitigation code to crt-guest and can’t get it to work properly at all. The noise/static happens, but when I use curvature the screen has a blurred texture of the game I’m playing where it should be black (nothing) for the curve.
Also can’t get the masks to do the curvature thing. Some assistance would be greatly appreciated 
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