Koko-aio shader discussions and updates

[kokoko3k]

At last, here are Gameboy Color presets.

@Elessar84, @Noromu

Screen has rgb layout, low contrast with big vignette and spots to simulate world light over a passive display and high basal grid level.
No colorization applied, it relies on the default one done by Gambatte core.

Base one is: GameboyColor.slangp

Overlay variants, closeup and taller:

GameboyColor-Overlay.slangp

GameboyColor-Overlay-Taller.slangp

Last, the ones that emulate a IPS modded GBC, so with backlit/brighter colorful display.
There, ambient lights are meant to be inside the transulcent case; closeup and taller versions:

GameboyColor-Overlay-IPS.slangp

GameboyColor-Overlay-Taller-IPS.slangp

[Hari-82]

looking awesome! can’t wait to try 'em out!

Are those presets already available?

[kokoko3k]

Yes, thank you! They are on the dev repo.

[Noromu]

Cool,I will try,thanks

[Elessar84]

@ kokoko3k It looks great. Thank you very much.

[golivax]

Hi @kokoko3k ! I love your shaders, especially Tv-NTSC_Generic-FXAA_sharp-Selective for N64. It makes the low-res HUDs look quite nice. And ParallelRDP with 2x upscale and 1/2 downsampling takes care of the 3d polygons and jagged edges. This combination results in a very good experience overall, at least to my eyes

Just one question. Are your presets overall tuned to 1080p or 4k? Is there anything I should change in Tv-NTSC_Generic-FXAA_sharp-Selective when using a 4k display? Not sure if it’s just my brain playing tricks on me, but I wonder if scanlines should be ever so slightly more pronounced when using a 4k display.

Oh, and a final question: are planning to release a new version? I saw you pushed several commits since last version already. Thanks!!!

Thank you!

[kokoko3k]

Hi there,
glad to hear you’re satisfied with that preset; I test my preset on a 1080p display, so they are optimized for that size, as per the scanline look, they should look better on 4k without touching anything.
However, if you want they to look more pronunced, you can try to set the parameter:
"Scanlines (0 to disable)" from 1.0 to 1.25.

If it is not enough, another parameter you can play with, since you’re on a 4k display (on 1080p it is likely to produce moire) is:
"Overmask (1.0 = neutral)" to something greater than 1.0; whatch out for moire anyway for higher values.

Overmask Examples (open in a new window at 100%)

Overmask = 1.0:

Overmask = 1.5:

You may want to lower the halo strength as overmask is pushed higher by the scaled amount to keep the brightness as the same level, eg: since we pushed overmask by 1.5, i reduce the halo by that amount (0.5/1.5 = 0.333), the same probably applies to bloom mix, but i’ve not touched it in the next example:

Overmask = 1.5; halo = 0.33:

New version is certainly coming, but i cannot tell you when, since i’m a bit busy atm; however you can try the development releases from the main repository linked in the first post.

[oldpainless]

Updated my install with the latest dev repo - nice!

[kokoko3k]

Snake preview of more work on scanline look.
Finally I managed to find a way to let them vertically grow much much more than before.

My previous attempts with the canonical way always led to absymal performance, and they were all not compatible with other shader features (staggering, moire mitigation and so on)

but finally I found a way that is almost free:
Warping coords and keep using my beloved sin(), yay!

I’m still working on it (nothing released yet), but the results are promising, rounder and yet sharp look:

[Cyber]

Love the contrast and the edges man!

[kokoko3k]

Just pushed a bunch of changes/fixes, including the new scanline function.

If you want to test, this is the new parameter, inflation strength, under scanline section:

It has been set to 0.5 for all of the presets, but the handhelds ones, so every preset should look a bit better now.

0.5 is a bit conservative, you may want to try higher values, by keeping in mind that going over 1.0 is only adviced when you set “Phosphors height MAX” to a low value; very particular cases i’ve yet to experiment with.

[kongmao45678]

I cried, so beautiful

[oldpainless]

Works great - well done.

[oldpainless]

Still tweaking…or should I say playing…

[kokoko3k]

By combining scanline inflation with a lower glow light sharpness, the picture rounds more and seems to mantain an acceptable sharpness:

Params

DO_CCORRECTION = "1.000000"
IN_GLOW_POWER = "1.600000"
TEMPERATURE = "7200.000000"
IN_GLOW_GAMMA = "2.000000"
GAMMA_OUT = "0.500000"
DO_SHIFT_RGB = "1.000000"
OFFSET_STRENGTH = "0.250000"
SHIFT_R = "-20.000000"
SHIFT_G = "1.000000"
SHIFT_B = "20.000000"
DO_IN_GLOW = "1.000000"
IN_GLOW_BIAS = "0.000000"
IN_GLOW_SPREAD = "1.999999"
IN_GLOW_SPREAD_SHARPNESS = "1.149999"
IN_GLOW_W = "1.999999"
IN_GLOW_H = "2.999998"
RESSWITCH_GLITCH_SIZE = "0.000000"
DO_PIXELGRID = "1.000000"
PIXELGRID_MIN_H = "0.300000"
PIXELGRID_MAX_H = "0.700000"
PIXELGRID_INFLATION = "1.500000"
PIXELGRID_GAMMA_H = "5.199998"
PIXELGRID_DECON_R_H = "-0.600000"
PIXELGRID_DECON_B_H = "0.600000"
PIXELGRID_H_PRST = "5.000000"
PIXELGRID_MAX_W = "0.400000"
PIXELGRID_GAMMA_W = "1.500000"
PIXELGRID_BASAL_GRID = "0.020000"
PIXELGRID_Y_MASK = "0.300000"
PIXELGRID_Y_MASK_HEIGHT = "-2.000000"
PIXELGRID_Y_MASK_STEEP = "4.000000"
DO_HALO = "1.000000"
HALO_NO_PREGAIN = "1.000000"
HALO_POWER = "0.600000"
HALO_SHARPNESS = "7.000000"
HALO_GAMMA = "1.000000"
HALO_GAMMA_OUT = "1.300000"
HALO_VS_SCAN = "1.000000"
DO_BLOOM = "1.000000"
BLOOM_MIX = "0.300001"
BLOOM_GAMMA = "3.000000"
BLOOM_GAMMA_OUT = "2.200000"
BLOOM_POWER = "3.899997"
BLOOM_EYE_ADPT_SRT = "0.600000"
BLOOM_EYE_INERTIA = "10.000000"
BLOOM_OVER_WHITE = "0.000000"
DO_CURVATURE = "1.000000"
GEOM_CORNER_SMOOTH = "150.000000"
DO_BEZEL = "1.000000"
BEZEL_INNER_ZOOM = "-0.011000"
BEZEL_FRAME_ZOOM = "0.170000"
DO_VIGNETTE = "1.000000"
V_SIZE = "1.080000"
DO_SPOT = "1.000000"
S_POWER = "0.060000"
DO_DYNZOOM = "0.000000"

[kokoko3k]

NG-1.9.20 Is up on Github and should be available via online update soon.

NEWS:

• Allow to set glow light sharpness.
• Allow to modulate reflected and diffused light fadeout.
• New Monitor-Screen_Hmask-Screen_SlotMask-Chameleon preset.
• New Monitor-Screen_Hmask-Screen_SlotMask_Taller_Brighter preset.
• Real-time autocrop.
• Add Gameboy Color Presets.
• Scanlines inflation (rounder image)

FIXES:

• Tate: Fake scanline size compuration was using the wrong dimension.
• Little border between the bezel and the content will be visible even when using geometry overrides or luminosity tied zoom.
• Keep ambient leds in place when using bezel and geometry override zoom.
• Adapt ambientlight sampling point to geometry override zoom/aspect.
• Fixed Deltarender (not sure when it broke).

CHANGES:

• Better bezel reflections.
• Tuned ambientlight stretching for vertical games.
• Auto fake integer scanlines will kick in with lower screen resolutions.

MISC:

• Code cleanup.
• Several performance improvements, we’re almost back to 4.1 levels.
• Several presets updates.

[ROBMARK85]

Fantastic work - thank you so much!

[oldpainless]

Yep, looking good.

[Cyber]

So many shaders, so little time…

Greetings @kokoko3k, I’m not sure if this has been asked already but seeing that this is such an efficient shader when it comes to quality/performance cost, is it possible to further push the efficiency envelope by doing away with the Bezel and ambient lighting if a user wanted to do so?

[Syh]

I’m not that awake rn, but have you looked through the documentation, iirc there’s something about commenting out parameters to hardcode the values for a performance boost (I’m unsure how relavent it is to this tho, I do understand this is different from outright removing the code completely, but speed boost is speed boost)