I made some changes to code. Please compare with your earlier code, so that you can learn from it.
1. Removal of global variables. I only kept variables as global where necessary.
2. Better parameters adjustments. Setting back to 0 is not needed, when you change setting after changing preset, it'll be replaced with 0 automatically.
3. More readable code structure without changing style
Code
#@gui WaterGmicB : watergmicB, watergmic_previewB(0)
#@gui : note = note("<small>Author: <i><a href="http://prawnsushi.free.fr">Prawnsushi</i></a>. Latest Update: <i>2023/14/03</i>.</small>")
#@gui : sep = separator()
#@gui : Write settings on picture = bool(0)
#@gui : note = note("<small>Use original input image resolution or choose processing resolution.\nHigher Res is slower and not always better. </small>")
#@gui : Original Resolution = bool(1)
#@gui : Processing Resolution = int(1000,500,5000)
#@gui : Garagecoder's DCCI2x rescale (Post) = int(0,0,5)
#@gui : sep = separator()
#@gui : - Presets = choice(0,"None","1 - Soft","2 - Cracked","3 - Black","4 - Faded Black")
#@gui : sep = separator()
#@gui : Pre-Process = bool(1)
#@gui : - Sharpening = int(0,0,500)
#@gui : - Blur = float(0,0,10)
#@gui : - Local normalization = float(0.5,0.3,3)
#@gui : Sloppiness = bool(1)
#@gui : - Distort = float(3,0,20)
#@gui : - Blur = float(3,0,50)
#@gui : - Blend Mode = choice(13,"add","and","average","blue","burn","darken","difference","divide","dodge","exclusion","grainextract","grainmerge","green","hardlight","hardmix","hue","interpolation","lighten","lightness","linearburn","linearlight","luminance","multiply","negation","or","overlay","pinlight","red","reflect","saturation","screen","shapeaverage","softburn","softdodge","softlight","stamp","subtract","value","vividlight","xor")
#@gui : - Strength = float(0.5,0.0,1.0)
#@gui : sep = separator()
#@gui : Watering = bool(1)
#@gui : - Smoothing = int(12,0,40)
#@gui : - Iterations = int(1,0,10)
#@gui : Fuzzy Frame Size = int(30,0,350)
#@gui : - Frame Blur = int(20,0,150)
#@gui : - Frame Strentgh = float(0.5,0,5)
#@gui : Plasma Seed = int(-1,-1,9999999)
#@gui : - Plasma Saturation = int(-100,-100,100)
#@gui : - Blend Mode = choice(23,"add","and","average","blue","burn","darken","difference","divide","dodge","exclusion","grainextract","grainmerge","green","hardlight","hardmix","hue","interpolation","lighten","lightness","linearburn","linearlight","luminance","multiply","negation","or","overlay","pinlight","red","reflect","saturation",screen","shapeaverage","softburn","softdodge","softlight","stamp","subtract","value","vividlight","xor")
#@gui : - Plasma Strength = float(0.3,0,1)
#@gui : sep = separator()
#@gui : Cracks = bool(1)
#@gui : Sharpening = int(150,0,500)
#@gui : - Shock Filter = int(1,0,1)
#@gui : Light Relief (0 means all off) = float(0.15,0,1)
#@gui : - Light2 = float(0.02,0,1)
#@gui : - Light3 = float(0.02,0,1)
#@gui : sep = separator()
#@gui : Sketch = bool(1)
#@gui : - Likeness = int(25,0,30)
#@gui : - Threshold Min = int(0,0,255)
#@gui : - Threshold Max = int(20,0,255)
#@gui : - Sketch strength = float(1,0,1)
#@gui : --- Messy lines = float(0.9,0,1)
#@gui : - Blend Mode = choice(22,"add","and","average","blue","burn","darken","difference","divide","dodge","exclusion","grainextract","grainmerge","green","hardlight","hardmix","hue","interpolation","lighten","lightness","linearburn","linearlight","luminance","multiply","negation","or","overlay","pinlight","red","reflect","saturation",screen","shapeaverage","softburn","softdodge","softlight","stamp","subtract","value","vividlight","xor")
#@gui : note = note("<small>Setting Sktech Strength to 0 disables Messy lines too.\n Messy lines uses 'Breaks' by David Tschumperlé.</small>")
#@gui : Noise = float(3,0,6)
#@gui : Canvas = float(0.3,0,1)
#@gui : sep = separator()
#@gui : Post-Process = bool(1)
#@gui : Mix Original Hue/Sat = float(0.5,0,1)
#@gui : Brightness = float(0,-100,100)
#@gui : Contrast = float(0,-100,100)
#@gui : Gamma = float(0,-100,100)
#@gui : Hue = float(0,-100,100)
#@gui : Saturation = float(0,-100,100)
#@gui : sep = separator()
#@gui : - Old Presets = choice(0,"None","1 - Soft","2 - Cracked","3 - Black","4 - Faded Black")_0
watergmicB :
com,origres,procres,dccires,preset,bst,bstsharp,bstblur,locnorm,filt,dist,distblur,distmerge,diststr,wc,bilsize,bilrep,fuzz,fuzzblur,fuzstr,plsmseed,plsmsat,plasmerge,plastr,cracks,sckrad,sck,lgtone,lgttwo,lgthree,sketch,sklike,cutmin,cutmax,linestr,brkstr,skmerge,noistr,cnvs,post,huestr,bri,con,gam,hue,sat=${1-46}
m "BlendMode : $""=__mode" BlendMode "add","and","average","blue","burn","darken","difference","divide","dodge","exclusion","grainextract","grainmerge","green","hardlight","hardmix","hue","interpolation","lighten","lightness","linearburn","linearlight","luminance","multiply","negation","or","overlay","pinlight","red","reflect","saturation","screen","shapeaverage","softburn","softdodge","softlight","stamp","subtract","value","vividlight","xor","error"
m "BlendModeP : $""=__modep" BlendModeP "add","and","average","blue","burn","darken","difference","divide","dodge","exclusion","grainextract","grainmerge","green","hardlight","hardmix","hue","interpolation","lighten","lightness","linearburn","linearlight","luminance","multiply","negation","or","overlay","pinlight","red","reflect","saturation","screen","shapeaverage","softburn","softdodge","softlight","stamp","subtract","value","vividlight","xor","error"
m "BlendModeL : $""=__model" BlendModeL "add","and","average","blue","burn","darken","difference","divide","dodge","exclusion","grainextract","grainmerge","green","hardlight","hardmix","hue","interpolation","lighten","lightness","linearburn","linearlight","luminance","multiply","negation","or","overlay","pinlight","red","reflect","saturation","screen","shapeaverage","softburn","softdodge","softlight","stamp","subtract","value","vividlight","xor","error"
#~ to_rgb
normalize 0,255
nm[0] ORIG
ORIGW={0,w}
ORIGH={0,h}
if !$origres
res=$procres,$procres
rr2d[ORIG] $res,0,6
fi
if $bst
blur $bstblur sharpen $bstsharp normalize_local $locnorm,$locnorm
fi
[ORIG] nm. REND
if $filt
[ORIG] nm. FILT
local[FILT]
apc "deform "$dist" blur "$distblur""
done
blend[REND,FILT] ${__mode{$distmerge+1}},$diststr
n[REND] 0,255
fi
if $wc
if $plastr>0
[ORIG] nm. PLAS
local[PLAS]
if $plsmseed>-1
srand $plsmseed
fi
plasma 1,2,5
adjust_colors 0,0,0,0,$plsmsat
done
blend[REND,PLAS] ${__modep{$plasmerge+1}},$plastr
fi
fi
if $wc
if $fuzz>0
[ORIG] nm. FUZZ
local[FUZZ]
fill_color 0,0,0
spread {$fuzz/2},{$fuzz/2},0
negate
frame_fuzzy $fuzz
blur $fuzzblur,0
deform $fuzz
spread {$fuzz/2},{$fuzz/2}
spread 10
split c rm. . negate. append c
if $fuzstr!=1
mul $fuzstr
fi
done
blend_median[REND,FUZZ]
channels 0,2
normalize[REND] 0,255
fi
fi
local[REND]
if $cracks
if $sckrad>0
deform 1.5 sharpen $sckrad,$sck dilate_circ 1.5 sharpen $sckrad,$sck
fi
if $lgtone>0
repeat 3
fx_light_relief $lgtone,$lgttwo,$lgthree,0,0.2,50,50,20,0.084,0,0 blur 2 erode_circ 3 sharpen $sckrad
done
fi
fi
if $wc
repeat $bilrep
deform 0.3 sharpen 80,0,10,10 bilateral $bilsize,$bilsize,$bilsize,$bilsize
done
sharpen 80,0,10,10 sharpen 50 normalize 0,255
fi
done
if $post
if $huestr>0
[ORIG] nm. HUE
[ORIG] nm. SAT
move[ORIG] -1
blend[HUE,REND] hue,$huestr
blend[SAT,REND] saturation,{$huestr/3}
fi
fi
if $sketch
if $linestr>0
[ORIG] nm. LINE
local[LINE]
deform 1.5 rolling_guidance {31-$sklike},10,0.5
gradient_norm negate
if $brkstr>0
+fx_breaks. 0,5,30,0,3
blend[-1,-2,LINE] multiply,$brkstr
fi
normalize. $cutmin,$cutmax
sharpen. 100
spread. 0.7
done
blend[LINE,REND] ${__model{$skmerge+1}},$linestr
fi
fi
normalize[REND] 0,255
keep[REND]
if $post
adjust_colors[REND] $bri,$con,$gam,$hue,$sat
fi
if $dccires>0
repeat $dccires
fx_scale_dcci2x[REND] 1.15,5,1
done
fi
if $sketch
if $noistr>0 fx_noise $noistr,0,11,1,0,50,50 fi
# canvas effect
if $cnvs>0
+fc 255,255,255
noise. 1000,2 to_gray.
. .
parallel " repeat 20 blur_x. 10 sharpen. 5 spread. 0.7 deform. 0.5 done ","
repeat 20 blur_y.. 10 sharpen.. 5 spread.. 0.7 deform.. 0.5 done "
*. ..
keep[0,-1]
n. 0,255
+gradient. xy,1 -a[-2,-1] c
*. {$cnvs/100}
warp[REND] [-1],3,1,1,1
fi
fi
keep[REND]
if $com
RENDW={0,w}
RENDH={0,h}
expand_y 35,0
shift 0,35
text "${1-45}",10,30,12,1,255
text ${__mode{$distmerge+1}}" "${__modep{$plasmerge+1}}" "${__model{$skmerge+1}},10,50,20,1,255
fi
watergmic_previewB :
__output=${1-46}
preset,old_preset={[$5,$47]}
if $preset==1
variables=0,1,1000,0,1,1,0,0,3,1,20,10,10,0.5,1,12,2,127,42,0.365,-1,2,11,0.282,1,1,1,0.01,0.02,0.02,1,29,0,70,0.455,1,20,4,0.2,1,1,0,0,9,0,-7.2
elif $preset==2
variables=0,1,1000,0,2,0,0,0,0.3,1,3,3,13,0.5,1,12,1,0,20,0.5,-1,-100,37,0.755,1,500,1,0.027,0.02,0.02,1,25,0,220,1,0.9,22,6,0.3,1,1,0,0,31,0,0
elif $preset==3
variables=0,1,1000,0,3,1,0,0,2.3736,1,3,3,13,0.5,1,23,2,30,20,0.5,-1,-100,23,0.5,1,0,1,0.01,0.02,0.02,1,28,0,20,1,0.9,22,6,0,1,0,0,0,0,0,-100
elif $preset==4
variables=0,1,1000,0,4,1,308,0,2.3736,1,3,3,0,0.5,1,23,2,350,1,0.5,-1,100,10,1,1,0,1,0.2,0.02,0.02,1,29,0,9,0.9,1,22,6,0.12,1,0,0,0,13.4,0,-100
fi
if $preset
if $preset==$old_preset
if [$__output]!=[$variables]
__output=${1-4},0,${6-46}
fi
else
__output=$variables
fi
fi
com,origres,procres,dccires,preset,bst,bstsharp,bstblur,locnorm,filt,dist,distblur,distmerge,diststr,wc,bilsize,bilrep,fuzz,fuzzblur,fuzstr,plsmseed,plsmsat,plasmerge,plastr,cracks,sckrad,sck,lgtone,lgttwo,lgthree,sketch,sklike,cutmin,cutmax,linestr,brkstr,skmerge,noistr,cnvs,post,huestr,bri,con,gam,hue,sat=$__output
gui_split_preview "watergmicB $__output"
u "{"$com"}""{"$origres"}""{"$procres"}""{"$dccires"}""{"$preset"}""{"$bst"}""{"$bstsharp"}""{"$bstblur"}""{"$locnorm"}""{"$filt"}""{"$dist"}""{"$distblur"}"\
"{"$distmerge"}""{"$diststr"}""{"$wc"}""{"$bilsize"}""{"$bilrep"}""{"$fuzz"}""{"$fuzzblur"}""{"$fuzstr"}""{"$plsmseed"}""{"$plsmsat"}""{"$plasmerge"}"\
"{"$plastr"}""{"$cracks"}""{"$sckrad"}""{"$sck"}""{"$lgtone"}""{"$lgttwo"}""{"$lgthree"}""{"$sketch"}""{"$sklike"}""{"$cutmin"}""{"$cutmax"}""{"$linestr"}"\
"{"$brkstr"}""{"$skmerge"}""{"$noistr"}""{"$cnvs"}""{"$post"}""{"$huestr"}""{"$bri"}""{"$con"}""{"$gam"}""{"$hue"}""{"$sat"}""{"$preset"}"
.
