Part of the original question is being missed
Quote:
...I would like to use BIMP to semi-automatize and apply 'X effects' as needed on series of images.
With BIMP you do really need to avoid adding extra layers. I can get to here, but only using the extra plugin gmic_gimp_qt see:
http://www.gmic.euAttachment:
original1.jpg [ 410.74 KiB | Viewed 2935 times ]
The BIMP structure looks like this, all 'other gimp procedures'
Attachment:
bimp.jpg [ 146.76 KiB | Viewed 2935 times ]
1. The gmic filter, this takes 1 for the input layer and a command line v -99 fx_highlight_bloom 26.4,86.19,140.51,31,29.4,0
2. The Emboss filter, you can use BumpMap here but emboss is simpler
3. Auto enhance - no parameters here
4. A bit of extra contrast.
A zipped bimp file
example.bimp attached, remember to unzip it.
On a more general note, every image has to judged on its own merits, very difficult to create a recipe that is universal.