Just thin out the Gretchen green and add thin highlighlight successive coats of that until its lighter and a richer green!! About three to intensify the highlight!! That should work then glaze with a yellow and green ink mix really watered down this will make the shades and highlights tie in and add depth and intensity more!!
Hello, thanks for the advice!
shades and highlights have been applied to the skills.
the skin is alos highlighted with knarlock and gretchin green and it does not look as flat in reality.
However as you state the photo is taken at night in my cellar where i have my workspace.
Will try to upload a better pic.
Definately more shading. Try applying Aragax Earthshade on the skulls, try green wash on skin and after that try highlight with sorry - still using the old colours mix of knarlock & snot green & goblin green (1:0:0;1:1:0;0:2:1;0:1:2). Highlight the Eye with Bloodred ....
Maybe you need better lightning while taking the foto.