Blending

[Paul]

I keep having a go at this type of effect, i keep getting it 'ok' Buy not how i really want it to look, any ideas?

[Hoogle]

when painting in the layer mask put your brush sofness right down and paint it in slowly each time increasing the opacity maybe a slight colour match between the layers as well

[Hoogle]

you could also try the layer > matting remove black mat but dont think this is the case in the pic so just stick to a slight feathering

[siodre]

not sure about your layer setup, but try using a second set of mutant textures layers in folders. one set of mutant textures set normally, the second set to blending mode luminosity. extend the mask of the set using blending mode luminosity further down the finger. could give you a better transition between mutant and finger.

[fennyjohn]

When painting the layer mask to brush sofness on your back and paint it every time in the gradually increasing transparency may have slight color, and between layers.