(07-02-2021, 09:54 AM)didier Wrote: I've selected Addition for layers mode. It results something not so bad, but, naturally, to much colors of the image saturate to white like expected.
Didier.
Why addition?
You might not have a full understanding of the blending mode (I mean layer mode, I call it my way
)I would recommend those videos, Ok it's a bit long.... but in the end, when you will chose a blend mode you will know exactly why
https://www.youtube.com/watch?v=i1D9ijh3_-I ( yes it's Photoshop, but it's exactly the same way for GIMP and it's the only guy I found which goes with the "math" and real life usability, also he is enjoyable to listen = not boring)
https://www.youtube.com/watch?v=zGTbOfhyXnA (an older video version of the same guy, worth a watch as well, with more real life examples)
An important video about "color to alpha" to blend whatever you want to blend with another layer
https://youtu.be/YQCE2_tMcN4?t=275 (this one is the "Blend if" of GIMP (menu Colors/Color to alpha), a tool which is way underrated and does wonders when you use the sliders, watch it up to the end or you will miss many things (I've timed the video to pass the Photoshop part and go straight to the GIMP part))