I'll look forward to a tutorial PhotoComix, I love this effect
There is so much cool information here at Gimp Chat, it's great when someone finds one of these older threads. Cheers to Fullback66, and AnMal!

Very barebone ... but i will prepare a proper tutorial
As now i still resurrecting my poor Gimpainter...

odinbc: this place is a gold mine of useful old threads .
photo comix: do you remember exactly which filter you used for the first of the bw images you combined?

Sure !
i forgot to say that the image there are clickable , and clicking the first you get this http://www.flickr.com/photos/photocomix ... 196646566/

and there you will see that is pencil , more exactly GMIC/BW/Pencil i can say used with very very low values for amplitude and...
oh well for the first couple of sliders, the value i used were far lower then default, for the rest was the default

But again note that size, image size here is very important, at medium size that may even look just as BW , at original size here http://farm5.staticflickr.com/4131/5196 ... f53f_o.jpg you may see that the pattern of the pencil filter is even too evident

to be true i initially created this filter to nicely "artistically " break up that pattern (A pattern often created by the pencil filter in homogeneous area with not details ) pattern that is not bad but for sure not always desiderable

the other filter used is Sketch , the layer with the "sketch " filter has a double use , the first is make that pattern discussed above less obvious and repetitive, the other is to enrich and add more detail to the pencil layer that give the basic structure

As last step the original could be used to add colors
with the same technique i used to edit old washed out ganesha images
1) dup of the original is slightly blurred ,used on top in color mode, almost never at full opacity (let say from 50 to 85)
2) another dup of the original, also blurred but with different intensity go on the very top in overlay mode (or if the case to push on darkening in multiply mode

About the (gaussian blur) in 1 and 2, the final sharpness derive in the very largest part from the BW layers below,
blur the colour layer allow to merge sharp colour noise and/or sharp colours blotch that the colour mode often create , especially if used with high opacity,

The amount of blur may even be dramatic with the only limit to avoid colors "washing out" their natural space

About blur also the topmost dup in overlay mode, and blur different of a different amout :
again used in this way blur don't give a sensation of blur and here has a almost opposite effect, to give more apparent depth

Very last...the blur i just described is really not needed if as last step is used Anisotropic Smoothing on the visible (e A:S preset was is the Painter's Touch Option

photo comix: thank you! i started to experiment with this, so far it's not like your results, but i think it's going in the right direction .

maybe later today i may try to replicate...i can't promise a video ( even if i will try to record but at least i could share my setting, as preset or commands

If you have a link for some adapt image (CC please , or yours ) i may use that as original ..

photo comix: thanks for the offer, but i think i have enough to go on to keep experimenting on my own - and iä'm having fun with it .