i was exploring all trhe layer mode available from gmic, there are more then in gimp and there are several totally new for me
and i suppose not only to me so...why not to share

so here the Original, but we call image 1

IMAGE 1-ORIGINAL-

Raging Bull by karanj, on Flickr

image 2 is the same processed with the "steampunk pen" filter:
result is BW so now i want explore merging mode to find the most adapt to recover color

IMAGE 2-bw variant

[G'MIC] PhotoComix Steam-Pen ; -gimp_c_spp3 0.95,14,2,2,0.9,0,1,7,100,0 by PhotoComiX, on Flickr

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WHAT THE DIFFERENCE BETWEEN "Luminance" ,"Lightness" , " Value" LAYER MODE ?

we know value is also in gimp

VALUE

[G'MIC] Value ; -gimp_compose_value 1,0 by PhotoComiX, on Flickr


this instead is lightness

LIGHTNESS

[G'MIC] Lightness ; -gimp_compose_lightness 1,0 by PhotoComiX, on Flickr

LUMINANCE

[G'MIC] Luminance ; -gimp_compose_luminance 1,0 by PhotoComiX, on Flickr

above opacity was 100% here 47%

LUMINANCE -47%

[G'MIC] Luminance ; -gimp_compose_luminance 1,0 by PhotoComiX, on Flickr

i like also Median (that obviously calcolate the median )

MEDIAN

[G'MIC] Median ; -compose_median by PhotoComiX, on Flickr


and a surprise Edges...it should combine the edges and in this case make a nice effect...

EDGES

[G'MIC] Edges ; -gimp_compose_edges 1,2.50514,1 by PhotoComiX, on Flickr

not sure of what Grain merge does,except that in this case is too dark


[G'MIC] Grain merge ; -gimp_compose_grainmerge 1,0 by PhotoComiX, on Flickr

Also not sure of what "Interpolation" does but in this case it did well

INTERPOLATION

[G'MIC] Interpolation ; -gimp_compose_interpolation 1,0 by PhotoComiX, on Flickr

THIS IS " FREEZE" , no other information found


[G'MIC] Freeze ; -gimp_compose_freeze 1,0 by PhotoComiX, on Flickr

with lower opacity (48%)


[G'MIC] Freeze ; -gimp_compose_freeze 0.430147,0 by PhotoComiX, on Flickr

AND "STAMP" ? also here no information found

STAMP -48% Opacity

[G'MIC] Stamp ; -gimp_compose_stamp 0.481618,1 by PhotoComiX, on Flickr

that was 48% here with 85% opacity


[G'MIC] Stamp ; -gimp_compose_stamp 0.845588,1 by PhotoComiX, on Flickr

ooppss i have more but the rest i will post after the dinner

i would like know something about "Reflect"

REFLECT


[G'MIC] Reflect ; -gimp_compose_reflect 0.724265,0 by PhotoComiX, on Flickr

COLOR BURN ( opacity 48% )


[G'MIC] Color burn ; -gimp_compose_colorburn 0.453676,1 by PhotoComiX, on Flickr

HARD LIGHT


[G'MIC] Hard light ; -gimp_compose_hardlight 1,0 by PhotoComiX, on Flickr

well this is Darken (as gimp Darken Only) with swapped layers position and 48% opacity

DARKEN ONLY reversed layers -48%

[G'MIC] Darken ; -gimp_compose_darken 0.566176,1 by PhotoComiX, on Flickr

almost the same for lighten only

Lighten ONLY reversed layers 37%

OVERLAY

[G'MIC] Overlay ; -gimp_compose_overlay 0.636029,1 by PhotoComiX, on Flickr

MULTIPLY


[G'MIC] Multiply ; -gimp_compose_multiply 1,0 by PhotoComiX, on Flickr

also multiply but 47% opacity


[G'MIC] Multiply ; -gimp_compose_multiply 0.470588,1 by PhotoComiX, on Flickr

SCREEN


[G'MIC] Screen ; -gimp_compose_screen 1,0 by PhotoComiX, on Flickr

AVERAGE


[G'MIC] Average ; -gimp_compose_average 1,0 by PhotoComiX, on Flickr

SATURATION


[G'MIC] Saturation ; -gimp_compose_saturation 1,1 by PhotoComiX, on Flickr

SHAPE AVERAGE


[G'MIC] Shape average ; -gimp_compose_shapeaverage 1,0,1 by PhotoComiX, on Flickr