The difference a shader can do
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Here’s the difference of those 2 images:
If I crank up the brightness and contrast on that diff, there’s some sort of difference but it’s far too subtle (for me at least) to see unaided.
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Well, I was certainly not expecting this.
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Same deal. It looks like there may be some really slight color differences…? but they still don’t show up from a difference blend unless I crank up the contrast a lot.
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Is there any difference between the B (second) images from both my posts?
same deal. looks black, whole image shows up after super-boost, so probably some small whole-image color/brightness difference.
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Which screenshot looks best? Nvidia has these limited dynamic range 16-235 output driver setting for TVs. I tried to do the same thing here.
ECCO CRT vs emulator comparison: CRT Pixels auf Twitter: „Ecco the Dolphin (1992, Sega) - Genesis/Mega Drive Emulation vs. 14" Semp CRT Composite (Submitted by @PIayNeth) https://t.co/WFvlxIko8P“ / Twitter
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Full range all the way for me, I guess the middle one?
First image is default output of genesis plus gx and mupen64plus-next. Ecco looks green. Dark areas look a little bit washed out and bright areas look dull. Second image is range 16-235 adjusted to 0-255. Everything <= 16 is black. Everything >=235 is white. Third image is exaggerated.
vec4 limitRange(in vec4 col){
const lowp float unit = 1.0 / 255.0;
const lowp float min = unit * 16.0;
const lowp float max = unit * 235.0;
const lowp float offset = (1.0 - max - min) / 2.0;
const lowp float multiplier = 1.0 / (max - min);
col.rgb = clamp(((((col.rgb + offset) - 0.5) * multiplier)+ 0.5),0.0,1.0);
return col;
}
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So no limited to full stretching in any screenshot?
I don‘t know how to call it but if i squash lower 16 Bits and the highest 20 Bits together and spread the part in the middle i shrink the dynamic range in my opinion.
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shaders = "1"
feedback_pass = "0"
shader0 = "shaders_slang/crt/shaders/crt-gdv-mini-ultra.slang"
wrap_mode0 = "clamp_to_border"
mipmap_input0 = "false"
alias0 = ""
float_framebuffer0 = "false"
srgb_framebuffer0 = "false"
scale_type_x0 = "viewport"
scale_x0 = "1.000000"
scale_type_y0 = "viewport"
scale_y0 = "1.000000"
warpX = "0.030000"
warpY = "0.050000"
vignette = "1.000000"
gamma_out_red = "2.799999"
gamma_out_green = "2.000000"
gamma_out_blue = "2.600000"
glow = "0.440000"
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Just another comparison. Which one looks better?
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I like the first one 
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Those are some sexy looking shots right there.
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