Hello !
No, I didn't use an image on a layer, not really. In fact, I procedeed like that :
- Use acryilic 03 brush with red color to put some "burn marks" : https://zupimages.net/up/21/30/uz97.png
- Erase the red on the hair and on the eye for a more natural result => https://zupimages.net/up/21/30/znwd.png
- Select the "burn marks" with Free Selection, transform to layer one by one and go to G'mic > Colors > Color Blindness > Acromatopsia => https://zupimages.net/up/21/30/dj4d.png
- Then, I set the differents layers mode to "soft light"
- Superimpose the original image on the last image and lower the opacity. This is not exactly the same, I think I forgot a step since my attemps but I can't remember which one : https://zupimages.net/up/21/30/yyg5.png
- And I use smudge to merge the burn mark with the skin. I have some difficult to use this tool so this step is optional.
- The final result => https://zupimages.net/up/21/30/okdu.png
I thought that a burned blue skin would be grey, that's why the burn mark is quite grey.
No, I didn't use an image on a layer, not really. In fact, I procedeed like that :
- Use acryilic 03 brush with red color to put some "burn marks" : https://zupimages.net/up/21/30/uz97.png
- Erase the red on the hair and on the eye for a more natural result => https://zupimages.net/up/21/30/znwd.png
- Select the "burn marks" with Free Selection, transform to layer one by one and go to G'mic > Colors > Color Blindness > Acromatopsia => https://zupimages.net/up/21/30/dj4d.png
- Then, I set the differents layers mode to "soft light"
- Superimpose the original image on the last image and lower the opacity. This is not exactly the same, I think I forgot a step since my attemps but I can't remember which one : https://zupimages.net/up/21/30/yyg5.png
- And I use smudge to merge the burn mark with the skin. I have some difficult to use this tool so this step is optional.
- The final result => https://zupimages.net/up/21/30/okdu.png
I thought that a burned blue skin would be grey, that's why the burn mark is quite grey.