New CRT shader from Guest + CRT Guest Advanced updates

guest.r · 5 August 2023 20:13

New Release Version (2023-08-05-r2):

Notable changes:

Small tweak to the “clear scanlines” functionality.
Bloom substract can do ‘positive’ cutoff only.
Bloom sampling feature added. It’s now possible to have finer sampling and properly blurred effect with lesser radius. Works nice with pre-scalers. May allow some further ‘features’.
‘Negative’ halation reworked. New looks are possible with this functionality.
r2: new effect added under ‘negative’ mask bloom, mostly because it was unused and to preserve preset compatibility.

Download link:

https://mega.nz/file/M5Jj0CrZ#MUY1PRLDIwcf2hZawOCzitzzqHibItkBIFtcjVcdhIE

HereticZero · 5 August 2023 23:00

I was just about done with a preset that not only preservese the gamut but is also disturbingly acurate… and then you drop this on me.

guest.r · 6 August 2023 21:49

New Release Version (2023-08-06-r2):

Notable changes:

Small tweak to the “clear scanlines” functionality.
New (negative mask bloom) effect overhaul.
r2: optimizations.

Download link:

https://mega.nz/file/stYEjaiY#97yggXkhZGzr6WIztY9XnAWEG6mh5YJIsZt7FckWtRE

ProfessorBraun · 7 August 2023 18:37

Hey thank you for the updates, I am satisfied with the result obtained by a new combination of parameters that I am testing. Nice improvements sir !

RetroGames4K · 8 August 2023 01:57

Thanks for inplementing negative mask bloom. Looks really good

Fab · 8 August 2023 10:06

I’ve tried messing with it a little but I don’t quite understand its usage, what would be the ideal scenario? Ora what could you achieve with it that wasn’t doable before?

c9f5fdda06 · 8 August 2023 11:03

Only one way to find out

Find a memorable area and start to do some comparisons…when you get a chance. I hope to be able to contribute to this later.

guest.r · 8 August 2023 12:43

I want it to have some properties, but there is some work and testing involved. Hopefully it will turn out quite nicely.

sonkun · 9 August 2023 13:01

Had to step away from the scene for a bit but man even being away for a short while I see things have advanced even more with your latest updates. I’ve already downloaded it and checked it out and as always you come with the goods, thank you once again @guest.r

guest.r · 9 August 2023 16:24

New Release Version (2023-08-09-r1):

Notable changes:

New (negative mask bloom) effect overhaul. Best use it with finer bloom sampling.

Download link:

https://mega.nz/file/8t5kEajR#trutdcLFKp0Pmrlh2ZiG2hLGoo3PwwjJ6NSh3glFNSA

sonkun · 9 August 2023 17:00

Curious to see how this combination compares to plain negative bloom which is what I been using.

guest.r · 9 August 2023 17:05

It’s good at preserving color saturation of bright colors and scanline saturation. It should also have some (more) influence over adjecent pixels without much annoyance. Default bloom pass parameters aren’t this optimal, it should look nicer with some bloom color shaping.

sonkun · 9 August 2023 17:09

Nice. Looking forward to trying this out soon as I get home.

Hyllian · 9 August 2023 17:53

At last I’ve got the look I was searching by tweaking @guest.r’s shaders.

This is my Trinitron look:

I was a bit confused about how to extract luminance without loosing colors quality. After some days playing with it, I got something like Royale’s with some differences due to distinct implementations.

My tweaks (tested with the last two releases only):

#reference "shaders_slang/crt-guest-advanced-2023-08-09-release1/crt-guest-advanced.slangp"
TNTC = "4.000000"
wp_saturation = "1.200000"
glow = "0.000000"
bloom = "0.000000"
mask_bloom = "0.500000"
gsl = "0.000000"
scanline1 = "2.000000"
scanline2 = "10.000000"
beam_min = "2.000000"
beam_max = "1.000000"
beam_size = "1.000000"
scans = "0.500000"
scan_falloff = "1.000000"
spike = "0.000000"
h_sharp = "6.500000"
s_sharp = "0.000000"
shadowMask = "6.000000"
maskstr = "1.000000"
mcut = "1.100000"
maskboost = "3.000000"

sonkun · 9 August 2023 18:18

That’s sexy. It looks like a fusion between guest and royale.

guest.r · 9 August 2023 19:15

Yeah, with my default settings the trinitron look even with a proper mask is a bit meh, but you did a very nice tweaking, like the looks of it.

Hyllian · 9 August 2023 21:28

I made small changes that improves a bit the colors:

#reference "shaders_slang/crt-guest-advanced-2023-08-09-release1/crt-guest-advanced.slangp"
TNTC = "4.000000"
wp_saturation = "1.200000"
gamma_out = "2.200000"
glow = "0.000000"
bloom = "0.000000"
mask_bloom = "0.500000"
gsl = "0.000000"
scanline1 = "2.000000"
scanline2 = "10.000000"
beam_min = "2.000000"
beam_max = "0.950000"
beam_size = "1.000000"
scans = "0.500000"
scan_falloff = "1.000000"
spike = "0.000000"
h_sharp = "6.500000"
s_sharp = "0.000000"
shadowMask = "6.000000"
maskstr = "1.000000"
mcut = "1.100000"
maskboost = "2.500000"
mask_gamma = "2.200000"

ProfessorBraun · 10 August 2023 20:27

@guest.r Is it possible to achieve a stronger bloom/halation substract ? I think it can improve the overall picture with high radius/sigma values. While keeping mask visible and less blurry around bright pixels.

Here’s the results with a preset that I want to tweak for bright pixels (if possible with substract).

guest.r · 10 August 2023 21:21

With new release there will be options to adjust bloom and halation mask strengths at least (to very easily keep masks visible). Maybe finer bloom sampling could help, but i can only guess the overall situation. Otherwise magic glow can be a nice helper, maybe you could throw in a notch…

Edit: i could also return the negative bloom substract option for 'stronger results.

guest.r · 10 August 2023 21:50

New Release Version (2023-08-10-r1):

Notable changes:

New (negative mask bloom) effect small but nice improvement.
Bloom/halation substract alternate mode (re)added.
Introducing mask strength controls for bloom and halation. Existing presets shouldn’t be affected.

Download link:

https://mega.nz/file/g84GCA4A#gXM0mHUt3VXRuzIpgokJhXEOkt0-PwsHZx8mTtz2GdM