Add green color on trees

[Krikor]

I tested this filter for the first time: Colors - Dynamique Simple

The result at least for the image in question seems to produce a good initial result with just one click and no need for adjustments.

   

But it seems that this filter creates some strange artifacts in the image, which prevents the use of other filters later; such as the steps mentioned by rich2005 in post #3

I don't know what these types of artifacts are called.
In the generated image, the presence of these artifacts goes unnoticed, but when the image is subjected to the Colors - Hue-Saturation filter and adjustments are made to the Lightness option, these artifacts become easily visible.