Here is the exact values I used, but sometimes you have to vary them based on the particular image.
Enhance photo, clarify; value=5
Effects, artistic, chrome;
values: flaws=1, brightness=50, colour=32,32,32
You can experiment with all of these, and if you want a colour one then choose use original colour.
Enhance photo, automatic contrast enhancement;
bias=darker, strength=normal, appearance=bold
(applied 4 times or untill dark enough)
these can also be experimented with.
Now if the edges are too sharp and bright, use:
effects, edge efects, erode
If you did this step, you will then need to use fill flash filter, value =50
and also add some more contrast and brightness as required.
Otherwise, it is ready.
Here is the untouched original wing
Here is a giant insect wing in BW
Here is chrome with Using Original Colour (I also increased the colour saturation)
All of these settings can be adjusted using your eye as a guide.
Have fun
Brian
