>>44086974I think this might actually be a problem of the program you’re using. It seems gimp has a smudge tool that could be used to blend the edge of the shading layer, but I’m fairly sure other free programs have better options for mixing tones. Try Krita or fire alpaca and see if they have some variation of a blur or blend tool. There should be something that can soften the edges of your shading layer
Pic related is a screenshot from the krita manual