New CRT shader from Guest + CRT Guest Advanced updates

[guest.r]

New Release Version (2023-01-27-r1):

Notable changes:

• Mask gamma now influences ordinary bloom application, previously this connection wasn’t implemented. Ofc. the dafault setting doesn’t affect the effect, so older presets should be ‘safe’.
• Contrast implementation tweaks, should look better now.

Example of bloom mask mitigation and mask gamma 1.0:

Download link:

https://mega.nz/file/V8AV0ZbA#mJjnlPajj6BVZaHhuPrm8xQcSzgKt7dD4fNkQNXfmt4

[sonkun]

Nice just off the fact that you haven’t put out a new update in a while. I think I’ll put out a quick update myself to go along with this cause why not.

Edit: I thought it would be a fast tweak but then one tweak turned into another tweak then another now I’m just playing around in the settings lol. Guess I’ll post the new update when it’s ready.

[ProfessorBraun]

I just tested the update, it’s really a nice improvement, I couldn’t have this result before without losing details or having to use image-adjustment. Awesome !

[sonkun]

I’m analyzing your previous Slot Mask presets, I notice you put both the dark and bright scanline settings at 20.000, I’m assuming that’s how you got the scanlines to look thicker, I’ve never tried those settings that’s interesting to me. I’m stuck at work for a few hours but I’m looking forward to trying those settings out later when I get home.

I see you also raised the scanline gamma to the max at 5.000000, those settings helped me reduce moire by a little bit as well. Sometimes I experiment just turning settings up and down almost like I’m throwing darts at the wall to see what sticks, I’m curious to see how those dark/bright scanline settings will look with curvature and if it will produce any extra moire on my set up.

[ProfessorBraun]

One thing that is useful is the backlit zone test from 240p-testsuite-ps1. For me 8x8 pixels will be 9x9. So what i want is odd numbers ( 3,5,7,9—>17).

Also you need to disable afterglow-glow and bloom to make it work. Make sure you have the correct aspect ratio. This is a good way to test scanlines shape and sharpness settings.

[Cyber]

Just got an idea for a new type of Bloom and Glow. We already have Bloom, Glow and Mask Bloom, how about “Phosphor Bloom and Phosphor Glow”?

This could be a bloom and a glow effect that’s not based on the Core Output’s colours only but follows the individual phosphor colours’ brightness values. Instead of illuminating the entire area behind and around the pixels, it could take a vertical oval shape around each induvidual phosphor colour and spread based on that pattern. Who knows, maybe it might end up being a more realistic or at least an interesting option when it comes to the eventual output. So what you would have would be akin to 3 oval shaped halos which emanate not too far out and taper off somewhat aggressively from each RGB phosphor colour.

What do you think about this idea @guest.r or anyone else? Has this been thought of before and would something like this be easy to implement?

[Cyber]

@sonkun

scanline gamma to the max at 5.000000

It can go even higher than that.

[guest.r]

@Cyber

Just got an idea for a new type of Bloom and Glow. We already have Bloom, Glow and Mask Bloom, how about “Phosphor Bloom and Phosphor Glow”?

“Phosphor Glow” is aldeady implemented, if you use negative parameter values for it.

“Phosphor Bloom” is not this hard to implement, but it would require an additional pass with results quite similar to ordinary mask mitigation techniques. I have tried this in some older FS-UAE crt shaders.

[sonkun]

I’m not sure if I’d want to go any further than that lol. So far I’ve been testing out @ProfessorBraun’s scanline settings while giving it the sonkun twist and I’m liking what I see, might just end up putting a update out using them, I like how the scanlines have a little more volume. Still doing a little more experimenting.

[Cyber]

Yeah, was just stating it for the record since I encountered a situation where coming from the old Scanline Gamma Offset parameter, after applying the formula to convert the values to the new Scanline Gamma setting I found that settings ended up outside of the maximum range in the menu sometimes even though they were within the menu range when using Scanline Gamma Offset.

I used this to eliminate the last hints of moire from my @soqueroeu -TV Backgrounds CyberLab Special Edition presets.

[sonkun]

Maybe I’ll try that out later then. What number did you end up choosing to help eliminate the moire?

[Cyber]

@sonkun

What number did you end up choosing to help eliminate the moire?

In that particular case, using those particular Mask, Scanline and other Settings, I ended up using a value of 6 after conversion from Scanline Gamma Offset but you should use as much as you need for any particular case.

I used Mike Tyson Punch Out for much of that round of testing and I also made use of the Scanline Falloff setting.

What I’ve recently learned is that an easy way to reduce or prevent moire artifacts is to use Mask Type and Size settings that generate an appropriate TVL for the amount of available pixels available in the viewport.

So, that might mean increasing TVL from the current settings that are displaying the issue by using settings that produce finer Mask Details. This seems to work wonders and it’s what I use in my CyberLab FRS-Mini TV presets where I use 1080p Optimized Mask settings at 4K screen resolution because the effective resolution due to the smaller viewport would in fact be closer to 1080p than 4K.

Normally when using a higher TVL preset at a higher resolution and leaving all other settings equal, I’ve noticed a softening of the output. In my upcoming presets, I intend to address that using tweaked sharpness settings. So having multiple groups of presets has helped me because I didn’t have to make new presets in order to get the More to go away, I just had to tap into and repurpose another folder of presets which I already had available in a sort of modular approach. The same goes for my “Le’Sarsh” 4K_Optimized Presets. Believe it or not, they are identical to my 1440p Optimized presets.

They may not remain that way in the future though as I intend to further optimize them by increasing sharpness at some point.

[sonkun]

@Cyber

In that particular case, using those particular Mask, Scanline and other Settings, I ended up using a value of 6 after conversion from Scanline Gamma Offset but you should use as much as you need for any particular case.

This information made a nice difference, I noticed a decrease in moire by raising it up to 6, haven’t tried higher numbers yet. I use certain games to test certain things myself plus I also have to see if one setting looks good on both warm and cool white point temperature settings.

I gotta check out some of your presets, I’ve seen some of them but not all of them, it’s always nice learning new things from other users that can help with their own presets.

[Cyber]

@sonkun

This information made a nice difference, I noticed a decrease in moire by raising it up to 6, haven’t tried higher numbers yet.

No problem man. I’m glad I can share what I’ve picked up and observed at times, especially when it might be relevant.

New CRT shader from Guest + CRT Guest Advanced updates

Especially when using greater range between Scanline Shape Dark Pixels and Scanline Shape Bright Pixels parameters it can be now controlled how quick they are getting thinner. For example, the ‘dark thinning’ can be very narrow now, but if the Scanline Falloff parameter is adjusted/decreased, the general coverage of the screen is still good enough. This is just one example of the usage, the parameter can be used to achieve scanline beam dynamics which previously eluded control of the user.

I used to dable in these settings much more with my older aperture grill presets. I think I’m going to do some experimentation with at least the Scanline Falloff and Mask Falloff with my new ones now that I have a much better understanding of what they’re for and how they work.

@sonkun

I gotta check out some of your presets, I’ve seen some of them but not all of them, it’s always nice learning new things from other users that can help with their own presets.

Of course. Plus there’s a lot of useful information buried in time in these forums as well. It’s nice to bring some of these discussions and tips back to the forefront where they belong.

New CRT shader from Guest + CRT Guest Advanced updates

I can get superb results with my 4k sdr tv settings if i only lower the mask strengths a bit from 100%. Otherwise the colors aren’t right, the brightness is almost there. If a mask is RGBX… type, then it comes to convergence, mask falloff, and scanline faloff to picture a target crt experience. Otherwise it’s a very personal preference to use 100% masks only, and a waiting game to.

New CRT shader from Guest + CRT Guest Advanced updates

This is mostly usable when using stronger scanlines, especially with darker pixels. Mask falloff emulates individual phosphor sizes ‘shrinking’ if the color component is weaker in presence. When mask strength is quite high this can also help to saturate the appearance. Scanline falloff determines how fast the scanlines are getting thinner with certain setups. Default value is still 1.0 as neutral to old behavior, but lower values can be more realistic.

[guest.r]

With curved presets you can also try to decrease the slotmask strengths a bit, see if it helps against moire. Anyway, i would avoid a narrow scanline - full slotmask strenght combo even without curvature. Ofc. there is more free room with 4k setups.

[ProfessorBraun]

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mcut = "2.000000"
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double_slot = "2.000000"
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deconrr = "-1.000000"
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deconrby = "1.000000"
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SamplerLUT1_linear = "true"
SamplerLUT1_wrap_mode = "clamp_to_border"
SamplerLUT1_mipmap = "false"
SamplerLUT2 = "shaders_slang/crt/shaders/guest/advanced/lut/inv-trinitron-lut.png"
SamplerLUT2_linear = "true"
SamplerLUT2_wrap_mode = "clamp_to_border"
SamplerLUT2_mipmap = "false"
SamplerLUT3 = "shaders_slang/crt/shaders/guest/advanced/lut/nec-lut.png"
SamplerLUT3_linear = "true"
SamplerLUT3_wrap_mode = "clamp_to_border"
SamplerLUT3_mipmap = "false"
SamplerLUT4 = "shaders_slang/crt/shaders/guest/advanced/lut/ntsc-lut.png"
SamplerLUT4_linear = "true"
SamplerLUT4_wrap_mode = "clamp_to_border"
SamplerLUT4_mipmap = "false"

Edit: wrong copy paste and afterglow restored.

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shader0 = "shaders_slang/crt/shaders/guest/advanced/stock.slang"
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mipmap_input4 = "false"
alias4 = "NPass1"
float_framebuffer4 = "true"
srgb_framebuffer4 = "false"
scale_type_x4 = "source"
scale_x4 = "4.000000"
scale_type_y4 = "source"
scale_y4 = "1.000000"
shader5 = "shaders_slang/crt/shaders/guest/advanced/ntsc/ntsc-pass2.slang"
filter_linear5 = "true"
wrap_mode5 = "clamp_to_border"
mipmap_input5 = "false"
alias5 = ""
float_framebuffer5 = "true"
srgb_framebuffer5 = "false"
scale_type_x5 = "source"
scale_x5 = "0.500000"
scale_type_y5 = "source"
scale_y5 = "1.000000"
shader6 = "shaders_slang/crt/shaders/guest/advanced/ntsc/ntsc-pass3.slang"
filter_linear6 = "true"
wrap_mode6 = "clamp_to_border"
mipmap_input6 = "false"
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scale_type_x6 = "source"
scale_x6 = "1.000000"
scale_type_y6 = "source"
scale_y6 = "1.000000"
shader7 = "shaders_slang/crt/shaders/guest/advanced/custom-fast-sharpen.slang"
filter_linear7 = "true"
wrap_mode7 = "clamp_to_border"
mipmap_input7 = "false"
alias7 = "NtscPass"
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scale_type_x7 = "source"
scale_x7 = "1.000000"
scale_type_y7 = "source"
scale_y7 = "1.000000"
shader8 = "shaders_slang/crt/shaders/guest/advanced/stock.slang"
filter_linear8 = "true"
wrap_mode8 = "clamp_to_border"
mipmap_input8 = "true"
alias8 = "PrePass"
float_framebuffer8 = "false"
srgb_framebuffer8 = "false"
scale_type_x8 = "source"
scale_x8 = "1.000000"
scale_type_y8 = "source"
scale_y8 = "1.000000"
shader9 = "shaders_slang/crt/shaders/guest/advanced/avg-lum-ntsc.slang"
filter_linear9 = "true"
wrap_mode9 = "clamp_to_border"
mipmap_input9 = "true"
alias9 = "AvgLumPass"
float_framebuffer9 = "false"
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scale_type_x9 = "source"
scale_x9 = "1.000000"
scale_type_y9 = "source"
scale_y9 = "1.000000"
shader10 = "shaders_slang/crt/shaders/guest/advanced/linearize-ntsc.slang"
filter_linear10 = "true"
wrap_mode10 = "clamp_to_border"
mipmap_input10 = "false"
alias10 = "LinearizePass"
float_framebuffer10 = "true"
srgb_framebuffer10 = "false"
scale_type_x10 = "source"
scale_x10 = "1.000000"
scale_type_y10 = "source"
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shader11 = "shaders_slang/crt/shaders/guest/advanced/crt-guest-advanced-ntsc-pass1.slang"
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wrap_mode11 = "clamp_to_border"
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alias11 = "Pass1"
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scale_type_x11 = "viewport"
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scale_type_y11 = "source"
scale_y11 = "1.000000"
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filter_linear12 = "true"
wrap_mode12 = "clamp_to_border"
mipmap_input12 = "false"
alias12 = ""
float_framebuffer12 = "true"
srgb_framebuffer12 = "false"
scale_type_x12 = "absolute"
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scale_type_y12 = "source"
scale_y12 = "1.000000"
shader13 = "shaders_slang/crt/shaders/guest/advanced/gaussian_vertical.slang"
filter_linear13 = "true"
wrap_mode13 = "clamp_to_border"
mipmap_input13 = "false"
alias13 = "GlowPass"
float_framebuffer13 = "true"
srgb_framebuffer13 = "false"
scale_type_x13 = "absolute"
scale_x13 = "800"
scale_type_y13 = "absolute"
scale_y13 = "600"
shader14 = "shaders_slang/crt/shaders/guest/advanced/bloom_horizontal.slang"
filter_linear14 = "true"
wrap_mode14 = "clamp_to_border"
mipmap_input14 = "false"
alias14 = ""
float_framebuffer14 = "true"
srgb_framebuffer14 = "false"
scale_type_x14 = "absolute"
scale_x14 = "800"
scale_type_y14 = "absolute"
scale_y14 = "600"
shader15 = "shaders_slang/crt/shaders/guest/advanced/bloom_vertical.slang"
filter_linear15 = "true"
wrap_mode15 = "clamp_to_border"
mipmap_input15 = "false"
alias15 = "BloomPass"
float_framebuffer15 = "true"
srgb_framebuffer15 = "false"
scale_type_x15 = "absolute"
scale_x15 = "800"
scale_type_y15 = "absolute"
scale_y15 = "600"
shader16 = "shaders_slang/crt/shaders/guest/advanced/crt-guest-advanced-ntsc-pass2.slang"
filter_linear16 = "true"
wrap_mode16 = "clamp_to_border"
mipmap_input16 = "false"
alias16 = ""
float_framebuffer16 = "true"
srgb_framebuffer16 = "false"
scale_type_x16 = "viewport"
scale_x16 = "1.000000"
scale_type_y16 = "viewport"
scale_y16 = "1.000000"
shader17 = "shaders_slang/crt/shaders/guest/advanced/deconvergence-ntsc.slang"
filter_linear17 = "true"
wrap_mode17 = "clamp_to_border"
mipmap_input17 = "false"
alias17 = ""
float_framebuffer17 = "false"
srgb_framebuffer17 = "false"
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scale_type_y17 = "viewport"
scale_y17 = "1.000000"
quality = "-1.000000"
ntsc_fields = "1.000000"
ntsc_phase = "2.000000"
ntsc_ring = "1.000000"
ntsc_sharp = "-10.000000"
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CCONTR = "0.000000"
CDETAILS = "0.000000"
GAMMA_INPUT = "2.500000"
interm = "0.000000"
HSHARPNESS = "1.000000"
SIGMA_HOR = "0.100000"
S_SHARP = "0.000000"
HSHARP = "0.000000"
HARNG = "0.000000"
spike = "2.000000"
SIZEHB = "0.000000"
SIGMA_HB = "0.040000"
SIZEVB = "1.000000"
SIGMA_VB = "0.040000"
glow = "0.020000"
bloom = "0.250000"
brightboost = "1.000000"
brightboost1 = "1.000000"
gsl = "-1.000000"
scanline1 = "70.000000"
scanline2 = "63.000000"
beam_min = "0.850000"
beam_max = "0.850000"
beam_size = "0.000000"
scangamma = "5.000000"
bsize1 = "0.000000"
shadowMask = "2.000000"
maskstr = "1.000000"
mcut = "2.000000"
masksize = "2.000000"
maskDark = "0.000000"
maskLight = "1.000000"
mask_gamma = "2.500000"
slotwidth = "6.000000"
double_slot = "2.000000"
gamma_out = "2.200000"
deconrr = "1.000000"
deconrb = "-1.000000"
deconrry = "1.000000"
deconrby = "-1.000000"
post_br = "1.860000"
textures = "SamplerLUT1;SamplerLUT2;SamplerLUT3;SamplerLUT4"
SamplerLUT1 = "shaders_slang/crt/shaders/guest/advanced/lut/trinitron-lut.png"
SamplerLUT1_linear = "true"
SamplerLUT1_wrap_mode = "clamp_to_border"
SamplerLUT1_mipmap = "false"
SamplerLUT2 = "shaders_slang/crt/shaders/guest/advanced/lut/inv-trinitron-lut.png"
SamplerLUT2_linear = "true"
SamplerLUT2_wrap_mode = "clamp_to_border"
SamplerLUT2_mipmap = "false"
SamplerLUT3 = "shaders_slang/crt/shaders/guest/advanced/lut/nec-lut.png"
SamplerLUT3_linear = "true"
SamplerLUT3_wrap_mode = "clamp_to_border"
SamplerLUT3_mipmap = "false"
SamplerLUT4 = "shaders_slang/crt/shaders/guest/advanced/lut/ntsc-lut.png"
SamplerLUT4_linear = "true"
SamplerLUT4_wrap_mode = "clamp_to_border"
SamplerLUT4_mipmap = "false"

[sonkun]

@guest.r

With curved presets you can also try to decrease the slotmask strengths a bit, see if it helps against moire.

Yeah that was a possibility I was looking into, it’s either that, get rid of curvature altogether or just accept a little moire. I just have to accept it since I have all my cores/games set up using bezels/overlays from the Bezel Project plus I like the look of full Slot Mask.

In any case I’ve been cooking up in the shader lab and have made some progress, check it out.

Here’s my current rgb warm preset from the shader pack:

Here’s what I’ve got so far:

Same thing with rgb cool settings from the current shader pack:

And here’s what I got now so far:

Scanlines look a little more pronounced now I think, I also cranked the “crt mask boost” up to 2.00 messing around but that will end up being changed later.

Edit: few more pics after some more tweaking:

[guest.r]

@sonkun

Scanlines look a little more pronounced now I think, I also cranked the “crt mask boost” up to 2.00 messing around but that will end up being changed later.

If you are after a more coarse mask look, you can also try to lower mask gamma. High mask boost values can also produce an overly bright image and clipping, especially with mask mitigation techniques. Mask gamma support for ordinary bloom is only available since the latest version though.

[sonkun]

Haha the man himself sees my game plan, yes I’m going for the coarser mask look, always have been since the start, that look is the sexiest right there and I think I can finally achieve it with minimum moire this time around. Those first 4 pics I posted up there from mvsf are already obsolete to me, those Metal Sonic pics is the look I plan to put out in the next update.

Funny you mention the mask gamma setting as I still haven’t really touched it yet, since those mvsf pics I posted I lowered the crt mask boost to 1.40, at 2.00 or higher it was starting to produce this weird subtle greenish tint on the image. I also lowered the bright scanline setting from 1.00 to 0.90. Later on tonight I’ll play around with the new mask gamma setting you implemented in your latest update and see where that takes me. Hopefully I can put the finishing touches on these presets by tonight and get them ready for release as I really like how my presets are looking right now.

[guest.r]

Meanwhile i’m playing around with the “Magic Glow” a bit. I guess it can never look right lol, but i could still implement it since the performance hit is very small.