Would there be any significant gain in performance if you stripped the shader down to just the code for the scanlines, gaussian blur, gamma correction and bright boost?
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That would most likely be the case, not sure how significant the difference would be. But on a lower end system it should make a noticeable difference.
Not that you really asked me, lol.
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There would be a nice performance gain for sure. Although scanlines are quite demanding part of the code.
https://mega.nz/#!olIGRAzL!_dnLPpbsCXVVM2NsCBerrAOxv6o6G1_43iLv269zfZg
I cleaned the code a bitā¦ 
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I thought I remembered you saying that about the scanlines lol. Didnāt want to comment on it though as I wasnāt really sure.
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Is that a single pass version of your shader?
If not what all passes are absolutely needed for this?
Thatās an āordinaryā shader. Single pass version could be possible though, but iām not a fan of it since glow and bloom woudnāt work and the gamma in calculation would make it slower. Other passes are calculated at native resolutions, which are like 40x lighter.
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So linearize, linearize scanlines, both of the blur passes anything else?
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Really optional are the ācolor passesā and the afterglow pass. Avg-lum pass is already referenced in the main shader, but can be easily replaced with stock shader. It really depends of your goal.
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The avglum pass is referenced in what you just uploaded but it doesnāt seem to actually connect into anything. (At least from what I could tell.)
Ehh I donāt really have any goals for this, I was just asking what @Nesguy was going to end up asking, lol.
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That 2nd shot of Super Metroid looks very nice. I was wondering if you could share your settings of guest-dr-venom?
Thanks! Iām moving atm and my computer is packed up but Iāll post those settings when I get a chance.
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Try this.
If desired, you can lower/raise the blur with h_sharp, and adjust the scanlines with scanline1 and scanline2. Or you can go wild with adjusting parameters 
If you have a very bright display, I recommend mask type 0 and increasing the mask strength until brightness is reduced to a reasonable level, but make sure you have RGB subpixels first, otherwise itāll result in color fringing / chromatic aberration. You may also want to adjust the CRT and/or LUT color profiles.
shaders = "11"
shader0 = "shaders_slang/crt/shaders/guest/lut/lut.slang"
filter_linear0 = "false"
wrap_mode0 = "clamp_to_border"
mipmap_input0 = "false"
alias0 = ""
float_framebuffer0 = "false"
srgb_framebuffer0 = "false"
scale_type_x0 = "source"
scale_x0 = "1.000000"
scale_type_y0 = "source"
scale_y0 = "1.000000"
shader1 = "shaders_slang/crt/shaders/guest/color-profiles.slang"
filter_linear1 = "false"
wrap_mode1 = "clamp_to_border"
mipmap_input1 = "false"
alias1 = ""
float_framebuffer1 = "false"
srgb_framebuffer1 = "false"
scale_type_x1 = "source"
scale_x1 = "1.000000"
scale_type_y1 = "source"
scale_y1 = "1.000000"
shader2 = "shaders_slang/crt/shaders/guest/d65-d50.slang"
filter_linear2 = "false"
wrap_mode2 = "clamp_to_border"
mipmap_input2 = "false"
alias2 = "WhitePointPass"
float_framebuffer2 = "false"
srgb_framebuffer2 = "false"
scale_type_x2 = "source"
scale_x2 = "1.000000"
scale_type_y2 = "source"
scale_y2 = "1.000000"
shader3 = "shaders_slang/crt/shaders/guest/afterglow.slang"
filter_linear3 = "false"
wrap_mode3 = "clamp_to_border"
mipmap_input3 = "false"
alias3 = "AfterglowPass"
float_framebuffer3 = "false"
srgb_framebuffer3 = "false"
scale_type_x3 = "source"
scale_x3 = "1.000000"
scale_type_y3 = "source"
scale_y3 = "1.000000"
shader4 = "shaders_slang/crt/shaders/guest/avg-lum0.slang"
filter_linear4 = "false"
wrap_mode4 = "clamp_to_border"
mipmap_input4 = "false"
alias4 = ""
float_framebuffer4 = "false"
srgb_framebuffer4 = "false"
scale_type_x4 = "source"
scale_x4 = "1.000000"
scale_type_y4 = "source"
scale_y4 = "1.000000"
shader5 = "shaders_slang/crt/shaders/guest/avg-lum.slang"
filter_linear5 = "false"
wrap_mode5 = "clamp_to_border"
mipmap_input5 = "true"
alias5 = "AvgLumPass"
float_framebuffer5 = "false"
srgb_framebuffer5 = "false"
scale_type_x5 = "source"
scale_x5 = "1.000000"
scale_type_y5 = "source"
scale_y5 = "1.000000"
shader6 = "shaders_slang/crt/shaders/guest/linearize.slang"
filter_linear6 = "false"
wrap_mode6 = "clamp_to_border"
mipmap_input6 = "false"
alias6 = "LinearizePass"
float_framebuffer6 = "true"
srgb_framebuffer6 = "false"
scale_type_x6 = "source"
scale_x6 = "1.000000"
scale_type_y6 = "source"
scale_y6 = "1.000000"
shader7 = "shaders_slang/crt/shaders/guest/blur_horiz.slang"
filter_linear7 = "false"
wrap_mode7 = "clamp_to_border"
mipmap_input7 = "false"
alias7 = ""
float_framebuffer7 = "false"
srgb_framebuffer7 = "false"
scale_type_x7 = "source"
scale_x7 = "1.000000"
scale_type_y7 = "source"
scale_y7 = "1.000000"
shader8 = "shaders_slang/crt/shaders/guest/blur_vert.slang"
filter_linear8 = "false"
wrap_mode8 = "clamp_to_border"
mipmap_input8 = "false"
alias8 = "GlowPass"
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/linearize_scanlines.slang"
filter_linear9 = "true"
wrap_mode9 = "clamp_to_border"
mipmap_input9 = "false"
alias9 = ""
float_framebuffer9 = "true"
srgb_framebuffer9 = "false"
scale_type_x9 = "source"
scale_x9 = "1.000000"
scale_type_y9 = "source"
scale_y9 = "1.000000"
shader10 = "shaders_slang/crt/shaders/guest/crt-guest-dr-venom.slang"
filter_linear10 = "true"
wrap_mode10 = "clamp_to_border"
mipmap_input10 = "false"
alias10 = ""
float_framebuffer10 = "false"
srgb_framebuffer10 = "false"
scale_type_x10 = "viewport"
scale_x10 = "1.000000"
scale_type_y10 = "viewport"
scale_y10 = "1.000000"
parameters = "TNTC;CP;CS;WP;wp_saturation;SW;AR;PR;AG;PG;AB;PB;sat;lsmooth;GAMMA_INPUT;TAPSH;GLOW_FALLOFF_H;TAPSV;GLOW_FALLOFF_V;TATE;IOS;OS;BLOOM;brightboost;brightboost1;gsl;scanline1;scanline2;beam_min;beam_max;beam_size;h_sharp;s_sharp;csize;bsize;warpX;warpY;glow;shadowMask;masksize;vertmask;slotmask;slotwidth;double_slot;slotms;mcut;maskDark;maskLight;CGWG;gamma_out;spike;inter;interm;bloom;scans"
TNTC = "0.000000"
CP = "2.000000"
CS = "0.000000"
WP = "0.000000"
wp_saturation = "1.000000"
SW = "1.000000"
AR = "0.020000"
PR = "0.150000"
AG = "0.020000"
PG = "0.150000"
AB = "0.020000"
PB = "0.150000"
sat = "0.100000"
lsmooth = "0.900000"
GAMMA_INPUT = "2.400000"
TAPSH = "4.000000"
GLOW_FALLOFF_H = "0.000000"
TAPSV = "4.000000"
GLOW_FALLOFF_V = "0.000000"
TATE = "0.000000"
IOS = "0.000000"
OS = "1.000000"
BLOOM = "0.000000"
brightboost = "1.000000"
brightboost1 = "1.000000"
gsl = "2.000000"
scanline1 = "10.000000"
scanline2 = "15.000000"
beam_min = "1.000001"
beam_max = "0.999999"
beam_size = "0.000000"
h_sharp = "3.000000"
s_sharp = "0.000000"
csize = "0.000000"
bsize = "600.000000"
warpX = "0.000000"
warpY = "0.000000"
glow = "0.000000"
shadowMask = "-1.000000"
masksize = "1.000000"
vertmask = "0.000000"
slotmask = "0.000000"
slotwidth = "2.000000"
double_slot = "1.000000"
slotms = "1.000000"
mcut = "0.000000"
maskDark = "0.500000"
maskLight = "1.500000"
CGWG = "0.000000"
gamma_out = "2.200000"
spike = "0.500000"
inter = "400.000000"
interm = "1.000000"
bloom = "0.000000"
scans = "0.000000"
textures = "SamplerLUT1;SamplerLUT2;SamplerLUT3"
SamplerLUT1 = "shaders_slang/crt/shaders/guest/lut/sony_trinitron1.png"
SamplerLUT1_linear = "true"
SamplerLUT1_wrap_mode = "clamp_to_border"
SamplerLUT1_mipmap = "false"
SamplerLUT2 = "shaders_slang/crt/shaders/guest/lut/sony_trinitron2.png"
SamplerLUT2_linear = "true"
SamplerLUT2_wrap_mode = "clamp_to_border"
SamplerLUT2_mipmap = "false"
SamplerLUT3 = "shaders_slang/crt/shaders/guest/lut/other1.png"
SamplerLUT3_linear = "true"
SamplerLUT3_wrap_mode = "clamp_to_border"
SamplerLUT3_mipmap = "false"
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Is there an option to reverse the mask pattern in guest-dr-venom? E.g., instead of magenta-green with CGWG, make it green-magenta?
Iām using an LED-LCD with BGR subpixels atm. Itās got a decent amount of brightness, so now Iām checking out masks again, lol. Good times.
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I know what you mean, like with the āguest-smā BRG setup.
You could modify the code a bit, to get the desired mask pattern.
Like now it should look like this:
cmask = cmask.rbg;
color = color*cmask;
instead of
color = color*cmask;
A newer version of the shader is to be used tho for this mod. Any version which calculates the ācmaskā value will do.
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@Nesguy Also give the subpixel masks another shot with RBG, as I found a dumb mistake a couple of days ago that was making all of the yellow pixels blue(?). It didnāt matter much for RGB, but RBG uses yellow often.
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So I donāt know what I was thinking, magenta-green works fine for BGR subpixels, lol.
mask: MG
subpixels: BGR
result: BxRxGxBxRxGxā¦ etc.
ahem, carry onā¦
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Thanks for the settings!
Just out of curiosityā¦are displays with RBG subpixel structure represented on the market? My google search gave me junk results on this topic.
BGR or RGB seem a natural choice, since luma value/coeficient of the green color is the greatest and itās sort of logical for this subpixel to be placed in the middle.
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I think RBG is just another name for BGR. It seems the naming of layouts doesnāt always reflect the actual location of the subpixel, oddly enough.
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What @hunterk said. AFAIK, RBG and BGR are the same thing. BGR seems like the more accurate term since the screen would start with blue subpixels on the left.
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